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Finding the Fourth Proportional to 303,761.20, 455,641.80 and 135,281.20

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Solution

The fourth proportional to 303,761.20, 455,641.80 and 135,281.20 is: 202,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,761.20 : 455,641.80 = 135,281.20 : x
  2. Step 2: Convert to fraction form
    303,761.20/455,641.80 = 135,281.20/x
  3. Step 3: Cross multiply
    303,761.20x = 455,641.80 × 135,281.20
  4. Step 4: Simplify right side
    303,761.20x = 61,639,769,474.16
  5. Step 5: Solve for x
    x = 61,639,769,474.16/303,761.20
  6. Step 6: Final answer
    x = 202,921.80

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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.