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Finding the Fourth Proportional to 521,437.43, 781,524.59 and 221,287.48

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Solution

The fourth proportional to 521,437.43, 781,524.59 and 221,287.48 is: 331,663.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,437.43 : 781,524.59 = 221,287.48 : x
  2. Step 2: Convert to fraction form
    521,437.43/781,524.59 = 221,287.48/x
  3. Step 3: Cross multiply
    521,437.43x = 781,524.59 × 221,287.48
  4. Step 4: Simplify right side
    521,437.43x = 172,941,604,018.88
  5. Step 5: Solve for x
    x = 172,941,604,018.88/521,437.43
  6. Step 6: Final answer
    x = 331,663.19

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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.