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Finding the Fourth Proportional to 395,781.38, 593,678.55 and 115,314.02

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Solution

The fourth proportional to 395,781.38, 593,678.55 and 115,314.02 is: 172,972.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,781.38 : 593,678.55 = 115,314.02 : x
  2. Step 2: Convert to fraction form
    395,781.38/593,678.55 = 115,314.02/x
  3. Step 3: Cross multiply
    395,781.38x = 593,678.55 × 115,314.02
  4. Step 4: Simplify right side
    395,781.38x = 68,459,460,188.27
  5. Step 5: Solve for x
    x = 68,459,460,188.27/395,781.38
  6. Step 6: Final answer
    x = 172,972.92

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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.