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Finding the Fourth Proportional to 308,476.17, 425,694.15 and 172,508.58

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Solution

The fourth proportional to 308,476.17, 425,694.15 and 172,508.58 is: 238,060.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,476.17 : 425,694.15 = 172,508.58 : x
  2. Step 2: Convert to fraction form
    308,476.17/425,694.15 = 172,508.58/x
  3. Step 3: Cross multiply
    308,476.17x = 425,694.15 × 172,508.58
  4. Step 4: Simplify right side
    308,476.17x = 73,435,893,330.81
  5. Step 5: Solve for x
    x = 73,435,893,330.81/308,476.17
  6. Step 6: Final answer
    x = 238,060.18

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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.