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Finding the Fourth Proportional to 425,371.23, 638,322.87 and 172,651.71

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Solution

The fourth proportional to 425,371.23, 638,322.87 and 172,651.71 is: 259,085.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,371.23 : 638,322.87 = 172,651.71 : x
  2. Step 2: Convert to fraction form
    425,371.23/638,322.87 = 172,651.71/x
  3. Step 3: Cross multiply
    425,371.23x = 638,322.87 × 172,651.71
  4. Step 4: Simplify right side
    425,371.23x = 110,207,535,037.61
  5. Step 5: Solve for x
    x = 110,207,535,037.61/425,371.23
  6. Step 6: Final answer
    x = 259,085.54

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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.