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Finding the Fourth Proportional to 402,486.10, 603,729.15 and 396,581.20

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Solution

The fourth proportional to 402,486.10, 603,729.15 and 396,581.20 is: 594,871.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,486.10 : 603,729.15 = 396,581.20 : x
  2. Step 2: Convert to fraction form
    402,486.10/603,729.15 = 396,581.20/x
  3. Step 3: Cross multiply
    402,486.10x = 603,729.15 × 396,581.20
  4. Step 4: Simplify right side
    402,486.10x = 239,427,630,781.98
  5. Step 5: Solve for x
    x = 239,427,630,781.98/402,486.10
  6. Step 6: Final answer
    x = 594,871.80

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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.