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Finding the Fourth Proportional to 521,226.96, 781,053.12 and 387,479.76

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Solution

The fourth proportional to 521,226.96, 781,053.12 and 387,479.76 is: 580,634.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,226.96 : 781,053.12 = 387,479.76 : x
  2. Step 2: Convert to fraction form
    521,226.96/781,053.12 = 387,479.76/x
  3. Step 3: Cross multiply
    521,226.96x = 781,053.12 × 387,479.76
  4. Step 4: Simplify right side
    521,226.96x = 302,642,275,484.85
  5. Step 5: Solve for x
    x = 302,642,275,484.85/521,226.96
  6. Step 6: Final answer
    x = 580,634.35

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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.