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Finding the Fourth Proportional to 303,702.40, 455,542.80 and 137,490.40

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Solution

The fourth proportional to 303,702.40, 455,542.80 and 137,490.40 is: 206,230.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,702.40 : 455,542.80 = 137,490.40 : x
  2. Step 2: Convert to fraction form
    303,702.40/455,542.80 = 137,490.40/x
  3. Step 3: Cross multiply
    303,702.40x = 455,542.80 × 137,490.40
  4. Step 4: Simplify right side
    303,702.40x = 62,632,761,789.12
  5. Step 5: Solve for x
    x = 62,632,761,789.12/303,702.40
  6. Step 6: Final answer
    x = 206,230.71

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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.