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Finding the Fourth Proportional to 866,379.90, 1,299,375.45 and 416,871.21

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Solution

The fourth proportional to 866,379.90, 1,299,375.45 and 416,871.21 is: 625,213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,379.90 : 1,299,375.45 = 416,871.21 : x
  2. Step 2: Convert to fraction form
    866,379.90/1,299,375.45 = 416,871.21/x
  3. Step 3: Cross multiply
    866,379.90x = 1,299,375.45 × 416,871.21
  4. Step 4: Simplify right side
    866,379.90x = 541,672,216,085.80
  5. Step 5: Solve for x
    x = 541,672,216,085.80/866,379.90
  6. Step 6: Final answer
    x = 625,213.28

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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.