Home / 1,212,817,999.20-1,819,226,998.80-436,488,986.40

Finding the Fourth Proportional to 1,212,817,999.20, 1,819,226,998.80 and 436,488,986.40

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Solution

The fourth proportional to 1,212,817,999.20, 1,819,226,998.80 and 436,488,986.40 is: 654,733,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,817,999.20 : 1,819,226,998.80 = 436,488,986.40 : x
  2. Step 2: Convert to fraction form
    1,212,817,999.20/1,819,226,998.80 = 436,488,986.40/x
  3. Step 3: Cross multiply
    1,212,817,999.20x = 1,819,226,998.80 × 436,488,986.40
  4. Step 4: Simplify right side
    1,212,817,999.20x = 794,072,548,737,725,952
  5. Step 5: Solve for x
    x = 794,072,548,737,725,952/1,212,817,999.20
  6. Step 6: Final answer
    x = 654,733,479.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.