Home / 1,290,300,261.20-1,934,211,761.40-428,213,502.80

Finding the Fourth Proportional to 1,290,300,261.20, 1,934,211,761.40 and 428,213,502.80

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Solution

The fourth proportional to 1,290,300,261.20, 1,934,211,761.40 and 428,213,502.80 is: 641,909,188.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,300,261.20 : 1,934,211,761.40 = 428,213,502.80 : x
  2. Step 2: Convert to fraction form
    1,290,300,261.20/1,934,211,761.40 = 428,213,502.80/x
  3. Step 3: Cross multiply
    1,290,300,261.20x = 1,934,211,761.40 × 428,213,502.80
  4. Step 4: Simplify right side
    1,290,300,261.20x = 828,255,593,506,051,840
  5. Step 5: Solve for x
    x = 828,255,593,506,051,840/1,290,300,261.20
  6. Step 6: Final answer
    x = 641,909,188.44

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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.