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Finding the Fourth Proportional to 521,526.30, 782,872.65 and 403,719.90

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Solution

The fourth proportional to 521,526.30, 782,872.65 and 403,719.90 is: 606,031.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,526.30 : 782,872.65 = 403,719.90 : x
  2. Step 2: Convert to fraction form
    521,526.30/782,872.65 = 403,719.90/x
  3. Step 3: Cross multiply
    521,526.30x = 782,872.65 × 403,719.90
  4. Step 4: Simplify right side
    521,526.30x = 316,061,267,970.74
  5. Step 5: Solve for x
    x = 316,061,267,970.74/521,526.30
  6. Step 6: Final answer
    x = 606,031.31

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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.