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Finding the Fourth Proportional to 551,079.20, 826,618.80 and 545,830.40

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Solution

The fourth proportional to 551,079.20, 826,618.80 and 545,830.40 is: 818,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,079.20 : 826,618.80 = 545,830.40 : x
  2. Step 2: Convert to fraction form
    551,079.20/826,618.80 = 545,830.40/x
  3. Step 3: Cross multiply
    551,079.20x = 826,618.80 × 545,830.40
  4. Step 4: Simplify right side
    551,079.20x = 451,193,670,251.52
  5. Step 5: Solve for x
    x = 451,193,670,251.52/551,079.20
  6. Step 6: Final answer
    x = 818,745.60

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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.