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Finding the Fourth Proportional to 500,058.85, 690,179.58 and 378,988.96

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Solution

The fourth proportional to 500,058.85, 690,179.58 and 378,988.96 is: 523,079.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,058.85 : 690,179.58 = 378,988.96 : x
  2. Step 2: Convert to fraction form
    500,058.85/690,179.58 = 378,988.96/x
  3. Step 3: Cross multiply
    500,058.85x = 690,179.58 × 378,988.96
  4. Step 4: Simplify right side
    500,058.85x = 261,570,435,891.59
  5. Step 5: Solve for x
    x = 261,570,435,891.59/500,058.85
  6. Step 6: Final answer
    x = 523,079.31

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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.