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Finding the Fourth Proportional to 542,441.80, 813,662.70 and 261,987.40

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Solution

The fourth proportional to 542,441.80, 813,662.70 and 261,987.40 is: 392,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,441.80 : 813,662.70 = 261,987.40 : x
  2. Step 2: Convert to fraction form
    542,441.80/813,662.70 = 261,987.40/x
  3. Step 3: Cross multiply
    542,441.80x = 813,662.70 × 261,987.40
  4. Step 4: Simplify right side
    542,441.80x = 213,169,375,249.98
  5. Step 5: Solve for x
    x = 213,169,375,249.98/542,441.80
  6. Step 6: Final answer
    x = 392,981.10

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Similar ratio
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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.