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Finding the Fourth Proportional to 381,363.81, 572,017.92 and 156,663.21

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Solution

The fourth proportional to 381,363.81, 572,017.92 and 156,663.21 is: 234,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,363.81 : 572,017.92 = 156,663.21 : x
  2. Step 2: Convert to fraction form
    381,363.81/572,017.92 = 156,663.21/x
  3. Step 3: Cross multiply
    381,363.81x = 572,017.92 × 156,663.21
  4. Step 4: Simplify right side
    381,363.81x = 89,614,163,524.72
  5. Step 5: Solve for x
    x = 89,614,163,524.72/381,363.81
  6. Step 6: Final answer
    x = 234,983.40

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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.