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Finding the Fourth Proportional to 425,315.52, 638,098.02 and 125,803.98

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Solution

The fourth proportional to 425,315.52, 638,098.02 and 125,803.98 is: 188,742.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,315.52 : 638,098.02 = 125,803.98 : x
  2. Step 2: Convert to fraction form
    425,315.52/638,098.02 = 125,803.98/x
  3. Step 3: Cross multiply
    425,315.52x = 638,098.02 × 125,803.98
  4. Step 4: Simplify right side
    425,315.52x = 80,275,270,546.12
  5. Step 5: Solve for x
    x = 80,275,270,546.12/425,315.52
  6. Step 6: Final answer
    x = 188,742.87

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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.