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Finding the Fourth Proportional to 425,373.23, 638,325.87 and 172,653.71

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Solution

The fourth proportional to 425,373.23, 638,325.87 and 172,653.71 is: 259,088.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,373.23 : 638,325.87 = 172,653.71 : x
  2. Step 2: Convert to fraction form
    425,373.23/638,325.87 = 172,653.71/x
  3. Step 3: Cross multiply
    425,373.23x = 638,325.87 × 172,653.71
  4. Step 4: Simplify right side
    425,373.23x = 110,209,329,644.48
  5. Step 5: Solve for x
    x = 110,209,329,644.48/425,373.23
  6. Step 6: Final answer
    x = 259,088.54

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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.