Home / 413,834.11-620,416.33-129,378.31

Finding the Fourth Proportional to 413,834.11, 620,416.33 and 129,378.31

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Solution

The fourth proportional to 413,834.11, 620,416.33 and 129,378.31 is: 193,962.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,834.11 : 620,416.33 = 129,378.31 : x
  2. Step 2: Convert to fraction form
    413,834.11/620,416.33 = 129,378.31/x
  3. Step 3: Cross multiply
    413,834.11x = 620,416.33 × 129,378.31
  4. Step 4: Simplify right side
    413,834.11x = 80,268,416,271.80
  5. Step 5: Solve for x
    x = 80,268,416,271.80/413,834.11
  6. Step 6: Final answer
    x = 193,962.78

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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.