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Finding the Fourth Proportional to 425,275.47, 638,180.27 and 172,557.03

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Solution

The fourth proportional to 425,275.47, 638,180.27 and 172,557.03 is: 258,943.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,275.47 : 638,180.27 = 172,557.03 : x
  2. Step 2: Convert to fraction form
    425,275.47/638,180.27 = 172,557.03/x
  3. Step 3: Cross multiply
    425,275.47x = 638,180.27 × 172,557.03
  4. Step 4: Simplify right side
    425,275.47x = 110,122,491,995.80
  5. Step 5: Solve for x
    x = 110,122,491,995.80/425,275.47
  6. Step 6: Final answer
    x = 258,943.91

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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.