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Finding the Fourth Proportional to 398,876.56, 598,320.12 and 125,313.83

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Solution

The fourth proportional to 398,876.56, 598,320.12 and 125,313.83 is: 187,972.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,876.56 : 598,320.12 = 125,313.83 : x
  2. Step 2: Convert to fraction form
    398,876.56/598,320.12 = 125,313.83/x
  3. Step 3: Cross multiply
    398,876.56x = 598,320.12 × 125,313.83
  4. Step 4: Simplify right side
    398,876.56x = 74,977,787,299.06
  5. Step 5: Solve for x
    x = 74,977,787,299.06/398,876.56
  6. Step 6: Final answer
    x = 187,972.41

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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.