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Finding the Fourth Proportional to 308,458.68, 425,640.06 and 172,478.58

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Solution

The fourth proportional to 308,458.68, 425,640.06 and 172,478.58 is: 238,002.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,458.68 : 425,640.06 = 172,478.58 : x
  2. Step 2: Convert to fraction form
    308,458.68/425,640.06 = 172,478.58/x
  3. Step 3: Cross multiply
    308,458.68x = 425,640.06 × 172,478.58
  4. Step 4: Simplify right side
    308,458.68x = 73,413,793,139.91
  5. Step 5: Solve for x
    x = 73,413,793,139.91/308,458.68
  6. Step 6: Final answer
    x = 238,002.03

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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.