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Finding the Fourth Proportional to 542,761.20, 813,911.40 and 262,364.40

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Solution

The fourth proportional to 542,761.20, 813,911.40 and 262,364.40 is: 393,435.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,761.20 : 813,911.40 = 262,364.40 : x
  2. Step 2: Convert to fraction form
    542,761.20/813,911.40 = 262,364.40/x
  3. Step 3: Cross multiply
    542,761.20x = 813,911.40 × 262,364.40
  4. Step 4: Simplify right side
    542,761.20x = 213,541,376,114.16
  5. Step 5: Solve for x
    x = 213,541,376,114.16/542,761.20
  6. Step 6: Final answer
    x = 393,435.23

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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.