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Finding the Fourth Proportional to 425,632.90, 638,310.44 and 141,247.05

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Solution

The fourth proportional to 425,632.90, 638,310.44 and 141,247.05 is: 211,824.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,632.90 : 638,310.44 = 141,247.05 : x
  2. Step 2: Convert to fraction form
    425,632.90/638,310.44 = 141,247.05/x
  3. Step 3: Cross multiply
    425,632.90x = 638,310.44 × 141,247.05
  4. Step 4: Simplify right side
    425,632.90x = 90,159,465,927.97
  5. Step 5: Solve for x
    x = 90,159,465,927.97/425,632.90
  6. Step 6: Final answer
    x = 211,824.48

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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.