Home / 379,877.20-569,815.80-213,643.60

Finding the Fourth Proportional to 379,877.20, 569,815.80 and 213,643.60

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Solution

The fourth proportional to 379,877.20, 569,815.80 and 213,643.60 is: 320,465.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,877.20 : 569,815.80 = 213,643.60 : x
  2. Step 2: Convert to fraction form
    379,877.20/569,815.80 = 213,643.60/x
  3. Step 3: Cross multiply
    379,877.20x = 569,815.80 × 213,643.60
  4. Step 4: Simplify right side
    379,877.20x = 121,737,498,848.88
  5. Step 5: Solve for x
    x = 121,737,498,848.88/379,877.20
  6. Step 6: Final answer
    x = 320,465.40

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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.