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Finding the Fourth Proportional to 303,520.80, 455,281.20 and 126,009.30

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Solution

The fourth proportional to 303,520.80, 455,281.20 and 126,009.30 is: 189,013.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,520.80 : 455,281.20 = 126,009.30 : x
  2. Step 2: Convert to fraction form
    303,520.80/455,281.20 = 126,009.30/x
  3. Step 3: Cross multiply
    303,520.80x = 455,281.20 × 126,009.30
  4. Step 4: Simplify right side
    303,520.80x = 57,369,665,315.16
  5. Step 5: Solve for x
    x = 57,369,665,315.16/303,520.80
  6. Step 6: Final answer
    x = 189,013.95

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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.