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Finding the Fourth Proportional to 418,963.24, 628,543.26 and 138,480.46

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Solution

The fourth proportional to 418,963.24, 628,543.26 and 138,480.46 is: 207,753.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,963.24 : 628,543.26 = 138,480.46 : x
  2. Step 2: Convert to fraction form
    418,963.24/628,543.26 = 138,480.46/x
  3. Step 3: Cross multiply
    418,963.24x = 628,543.26 × 138,480.46
  4. Step 4: Simplify right side
    418,963.24x = 87,040,959,774.70
  5. Step 5: Solve for x
    x = 87,040,959,774.70/418,963.24
  6. Step 6: Final answer
    x = 207,753.21

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1.5x scale

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.