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Finding the Fourth Proportional to 609,726.80, 911,998.20 and 547,000.40

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Solution

The fourth proportional to 609,726.80, 911,998.20 and 547,000.40 is: 818,175.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,726.80 : 911,998.20 = 547,000.40 : x
  2. Step 2: Convert to fraction form
    609,726.80/911,998.20 = 547,000.40/x
  3. Step 3: Cross multiply
    609,726.80x = 911,998.20 × 547,000.40
  4. Step 4: Simplify right side
    609,726.80x = 498,863,380,199.28
  5. Step 5: Solve for x
    x = 498,863,380,199.28/609,726.80
  6. Step 6: Final answer
    x = 818,175.26

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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.