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Finding the Fourth Proportional to 398,418.80, 596,947.80 and 187,624.40

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Solution

The fourth proportional to 398,418.80, 596,947.80 and 187,624.40 is: 281,116.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,418.80 : 596,947.80 = 187,624.40 : x
  2. Step 2: Convert to fraction form
    398,418.80/596,947.80 = 187,624.40/x
  3. Step 3: Cross multiply
    398,418.80x = 596,947.80 × 187,624.40
  4. Step 4: Simplify right side
    398,418.80x = 112,001,972,806.32
  5. Step 5: Solve for x
    x = 112,001,972,806.32/398,418.80
  6. Step 6: Final answer
    x = 281,116.18

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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.