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Finding the Fourth Proportional to 399,149.12, 550,830.96 and 235,811

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Solution

The fourth proportional to 399,149.12, 550,830.96 and 235,811 is: 325,422.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,149.12 : 550,830.96 = 235,811 : x
  2. Step 2: Convert to fraction form
    399,149.12/550,830.96 = 235,811/x
  3. Step 3: Cross multiply
    399,149.12x = 550,830.96 × 235,811
  4. Step 4: Simplify right side
    399,149.12x = 129,891,999,508.56
  5. Step 5: Solve for x
    x = 129,891,999,508.56/399,149.12
  6. Step 6: Final answer
    x = 325,422.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.