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Finding the Fourth Proportional to 308,590.61, 425,874.11 and 172,633.70

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Solution

The fourth proportional to 308,590.61, 425,874.11 and 172,633.70 is: 238,245.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,590.61 : 425,874.11 = 172,633.70 : x
  2. Step 2: Convert to fraction form
    308,590.61/425,874.11 = 172,633.70/x
  3. Step 3: Cross multiply
    308,590.61x = 425,874.11 × 172,633.70
  4. Step 4: Simplify right side
    308,590.61x = 73,520,220,350.97
  5. Step 5: Solve for x
    x = 73,520,220,350.97/308,590.61
  6. Step 6: Final answer
    x = 238,245.17

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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.