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Finding the Fourth Proportional to 378,145.80, 567,218.70 and 238,177.80

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Solution

The fourth proportional to 378,145.80, 567,218.70 and 238,177.80 is: 357,266.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,145.80 : 567,218.70 = 238,177.80 : x
  2. Step 2: Convert to fraction form
    378,145.80/567,218.70 = 238,177.80/x
  3. Step 3: Cross multiply
    378,145.80x = 567,218.70 × 238,177.80
  4. Step 4: Simplify right side
    378,145.80x = 135,098,902,084.86
  5. Step 5: Solve for x
    x = 135,098,902,084.86/378,145.80
  6. Step 6: Final answer
    x = 357,266.70

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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.