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Finding the Fourth Proportional to 425,278.66, 638,185.08 and 172,560.28

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Solution

The fourth proportional to 425,278.66, 638,185.08 and 172,560.28 is: 258,948.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,278.66 : 638,185.08 = 172,560.28 : x
  2. Step 2: Convert to fraction form
    425,278.66/638,185.08 = 172,560.28/x
  3. Step 3: Cross multiply
    425,278.66x = 638,185.08 × 172,560.28
  4. Step 4: Simplify right side
    425,278.66x = 110,125,396,096.62
  5. Step 5: Solve for x
    x = 110,125,396,096.62/425,278.66
  6. Step 6: Final answer
    x = 258,948.79

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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.