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Finding the Fourth Proportional to 550,552.85, 825,829.28 and 391,120.55

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Solution

The fourth proportional to 550,552.85, 825,829.28 and 391,120.55 is: 586,680.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,552.85 : 825,829.28 = 391,120.55 : x
  2. Step 2: Convert to fraction form
    550,552.85/825,829.28 = 391,120.55/x
  3. Step 3: Cross multiply
    550,552.85x = 825,829.28 × 391,120.55
  4. Step 4: Simplify right side
    550,552.85x = 322,998,796,114.96
  5. Step 5: Solve for x
    x = 322,998,796,114.96/550,552.85
  6. Step 6: Final answer
    x = 586,680.82

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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.