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Finding the Fourth Proportional to 542,642.20, 813,732.90 and 262,245.40

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Solution

The fourth proportional to 542,642.20, 813,732.90 and 262,245.40 is: 393,256.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,642.20 : 813,732.90 = 262,245.40 : x
  2. Step 2: Convert to fraction form
    542,642.20/813,732.90 = 262,245.40/x
  3. Step 3: Cross multiply
    542,642.20x = 813,732.90 × 262,245.40
  4. Step 4: Simplify right side
    542,642.20x = 213,397,709,853.66
  5. Step 5: Solve for x
    x = 213,397,709,853.66/542,642.20
  6. Step 6: Final answer
    x = 393,256.75

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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.