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Finding the Fourth Proportional to 625,869.79, 938,979.65 and 205,440.91

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Solution

The fourth proportional to 625,869.79, 938,979.65 and 205,440.91 is: 308,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,869.79 : 938,979.65 = 205,440.91 : x
  2. Step 2: Convert to fraction form
    625,869.79/938,979.65 = 205,440.91/x
  3. Step 3: Cross multiply
    625,869.79x = 938,979.65 × 205,440.91
  4. Step 4: Simplify right side
    625,869.79x = 192,904,833,767.48
  5. Step 5: Solve for x
    x = 192,904,833,767.48/625,869.79
  6. Step 6: Final answer
    x = 308,218.80

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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.