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Finding the Fourth Proportional to 303,478.32, 455,335.20 and 125,940

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Solution

The fourth proportional to 303,478.32, 455,335.20 and 125,940 is: 188,958.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,478.32 : 455,335.20 = 125,940 : x
  2. Step 2: Convert to fraction form
    303,478.32/455,335.20 = 125,940/x
  3. Step 3: Cross multiply
    303,478.32x = 455,335.20 × 125,940
  4. Step 4: Simplify right side
    303,478.32x = 57,344,915,088
  5. Step 5: Solve for x
    x = 57,344,915,088/303,478.32
  6. Step 6: Final answer
    x = 188,958.85

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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.