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Finding the Fourth Proportional to 398,869.76, 598,309.88 and 132,630.29

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Solution

The fourth proportional to 398,869.76, 598,309.88 and 132,630.29 is: 198,947.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,869.76 : 598,309.88 = 132,630.29 : x
  2. Step 2: Convert to fraction form
    398,869.76/598,309.88 = 132,630.29/x
  3. Step 3: Cross multiply
    398,869.76x = 598,309.88 × 132,630.29
  4. Step 4: Simplify right side
    398,869.76x = 79,354,009,239.56
  5. Step 5: Solve for x
    x = 79,354,009,239.56/398,869.76
  6. Step 6: Final answer
    x = 198,947.17

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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.