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Finding the Fourth Proportional to 486,376.92, 671,149.14 and 282,387.96

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Solution

The fourth proportional to 486,376.92, 671,149.14 and 282,387.96 is: 389,665.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,376.92 : 671,149.14 = 282,387.96 : x
  2. Step 2: Convert to fraction form
    486,376.92/671,149.14 = 282,387.96/x
  3. Step 3: Cross multiply
    486,376.92x = 671,149.14 × 282,387.96
  4. Step 4: Simplify right side
    486,376.92x = 189,524,436,500.35
  5. Step 5: Solve for x
    x = 189,524,436,500.35/486,376.92
  6. Step 6: Final answer
    x = 389,665.77

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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.