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Finding the Fourth Proportional to 520,812.68, 781,335.30 and 221,302.76

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Solution

The fourth proportional to 520,812.68, 781,335.30 and 221,302.76 is: 332,003.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,812.68 : 781,335.30 = 221,302.76 : x
  2. Step 2: Convert to fraction form
    520,812.68/781,335.30 = 221,302.76/x
  3. Step 3: Cross multiply
    520,812.68x = 781,335.30 × 221,302.76
  4. Step 4: Simplify right side
    520,812.68x = 172,911,658,375.43
  5. Step 5: Solve for x
    x = 172,911,658,375.43/520,812.68
  6. Step 6: Final answer
    x = 332,003.55

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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.