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Finding the Fourth Proportional to 303,472.80, 455,391.45 and 125,961.30

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Solution

The fourth proportional to 303,472.80, 455,391.45 and 125,961.30 is: 189,017.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,472.80 : 455,391.45 = 125,961.30 : x
  2. Step 2: Convert to fraction form
    303,472.80/455,391.45 = 125,961.30/x
  3. Step 3: Cross multiply
    303,472.80x = 455,391.45 × 125,961.30
  4. Step 4: Simplify right side
    303,472.80x = 57,361,699,050.89
  5. Step 5: Solve for x
    x = 57,361,699,050.89/303,472.80
  6. Step 6: Final answer
    x = 189,017.60

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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.