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Finding the Fourth Proportional to 668,872.92, 922,983.75 and 396,894

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Solution

The fourth proportional to 668,872.92, 922,983.75 and 396,894 is: 547,677.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,872.92 : 922,983.75 = 396,894 : x
  2. Step 2: Convert to fraction form
    668,872.92/922,983.75 = 396,894/x
  3. Step 3: Cross multiply
    668,872.92x = 922,983.75 × 396,894
  4. Step 4: Simplify right side
    668,872.92x = 366,326,712,472.50
  5. Step 5: Solve for x
    x = 366,326,712,472.50/668,872.92
  6. Step 6: Final answer
    x = 547,677.60

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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.