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Finding the Fourth Proportional to 425,479.23, 638,441.19 and 275,680.80

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Solution

The fourth proportional to 425,479.23, 638,441.19 and 275,680.80 is: 413,665.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,479.23 : 638,441.19 = 275,680.80 : x
  2. Step 2: Convert to fraction form
    425,479.23/638,441.19 = 275,680.80/x
  3. Step 3: Cross multiply
    425,479.23x = 638,441.19 × 275,680.80
  4. Step 4: Simplify right side
    425,479.23x = 176,005,978,012.15
  5. Step 5: Solve for x
    x = 176,005,978,012.15/425,479.23
  6. Step 6: Final answer
    x = 413,665.26

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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.