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Finding the Fourth Proportional to 718,423.20, 1,078,801.20 and 482,810.40

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Solution

The fourth proportional to 718,423.20, 1,078,801.20 and 482,810.40 is: 724,999.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,423.20 : 1,078,801.20 = 482,810.40 : x
  2. Step 2: Convert to fraction form
    718,423.20/1,078,801.20 = 482,810.40/x
  3. Step 3: Cross multiply
    718,423.20x = 1,078,801.20 × 482,810.40
  4. Step 4: Simplify right side
    718,423.20x = 520,856,438,892.48
  5. Step 5: Solve for x
    x = 520,856,438,892.48/718,423.20
  6. Step 6: Final answer
    x = 724,999.47

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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.