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Finding the Fourth Proportional to 587,359.20, 881,038.80 and 385,280.40

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Solution

The fourth proportional to 587,359.20, 881,038.80 and 385,280.40 is: 577,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,359.20 : 881,038.80 = 385,280.40 : x
  2. Step 2: Convert to fraction form
    587,359.20/881,038.80 = 385,280.40/x
  3. Step 3: Cross multiply
    587,359.20x = 881,038.80 × 385,280.40
  4. Step 4: Simplify right side
    587,359.20x = 339,446,981,279.52
  5. Step 5: Solve for x
    x = 339,446,981,279.52/587,359.20
  6. Step 6: Final answer
    x = 577,920.60

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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.