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Finding the Fourth Proportional to 500,058.60, 690,179.23 and 378,988.71

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Solution

The fourth proportional to 500,058.60, 690,179.23 and 378,988.71 is: 523,078.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,058.60 : 690,179.23 = 378,988.71 : x
  2. Step 2: Convert to fraction form
    500,058.60/690,179.23 = 378,988.71/x
  3. Step 3: Cross multiply
    500,058.60x = 690,179.23 × 378,988.71
  4. Step 4: Simplify right side
    500,058.60x = 261,570,132,595.60
  5. Step 5: Solve for x
    x = 261,570,132,595.60/500,058.60
  6. Step 6: Final answer
    x = 523,078.97

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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.