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Finding the Fourth Proportional to 312,934.53, 431,842 and 169,690.89

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Solution

The fourth proportional to 312,934.53, 431,842 and 169,690.89 is: 234,169.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,934.53 : 431,842 = 169,690.89 : x
  2. Step 2: Convert to fraction form
    312,934.53/431,842 = 169,690.89/x
  3. Step 3: Cross multiply
    312,934.53x = 431,842 × 169,690.89
  4. Step 4: Simplify right side
    312,934.53x = 73,279,653,319.38
  5. Step 5: Solve for x
    x = 73,279,653,319.38/312,934.53
  6. Step 6: Final answer
    x = 234,169.28

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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.