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Finding the Fourth Proportional to 425,901.26, 638,220.72 and 172,873.86

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Solution

The fourth proportional to 425,901.26, 638,220.72 and 172,873.86 is: 259,054.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,901.26 : 638,220.72 = 172,873.86 : x
  2. Step 2: Convert to fraction form
    425,901.26/638,220.72 = 172,873.86/x
  3. Step 3: Cross multiply
    425,901.26x = 638,220.72 × 172,873.86
  4. Step 4: Simplify right side
    425,901.26x = 110,331,679,398.38
  5. Step 5: Solve for x
    x = 110,331,679,398.38/425,901.26
  6. Step 6: Final answer
    x = 259,054.60

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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.