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Finding the Fourth Proportional to 613,874.58, 921,387.78 and 377,678.58

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Solution

The fourth proportional to 613,874.58, 921,387.78 and 377,678.58 is: 566,872.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,874.58 : 921,387.78 = 377,678.58 : x
  2. Step 2: Convert to fraction form
    613,874.58/921,387.78 = 377,678.58/x
  3. Step 3: Cross multiply
    613,874.58x = 921,387.78 × 377,678.58
  4. Step 4: Simplify right side
    613,874.58x = 347,988,428,379.75
  5. Step 5: Solve for x
    x = 347,988,428,379.75/613,874.58
  6. Step 6: Final answer
    x = 566,872.19

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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.