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Finding the Fourth Proportional to 520,449.46, 717,943.21 and 316,562.74

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Solution

The fourth proportional to 520,449.46, 717,943.21 and 316,562.74 is: 436,688.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,449.46 : 717,943.21 = 316,562.74 : x
  2. Step 2: Convert to fraction form
    520,449.46/717,943.21 = 316,562.74/x
  3. Step 3: Cross multiply
    520,449.46x = 717,943.21 × 316,562.74
  4. Step 4: Simplify right side
    520,449.46x = 227,274,067,135.73
  5. Step 5: Solve for x
    x = 227,274,067,135.73/520,449.46
  6. Step 6: Final answer
    x = 436,688.07

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.