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Finding the Fourth Proportional to 616,237.20, 924,355.80 and 427,280.40

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Solution

The fourth proportional to 616,237.20, 924,355.80 and 427,280.40 is: 640,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,237.20 : 924,355.80 = 427,280.40 : x
  2. Step 2: Convert to fraction form
    616,237.20/924,355.80 = 427,280.40/x
  3. Step 3: Cross multiply
    616,237.20x = 924,355.80 × 427,280.40
  4. Step 4: Simplify right side
    616,237.20x = 394,959,115,966.32
  5. Step 5: Solve for x
    x = 394,959,115,966.32/616,237.20
  6. Step 6: Final answer
    x = 640,920.60

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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.