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Finding the Fourth Proportional to 722,166.88, 996,711.60 and 420,538.72

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Solution

The fourth proportional to 722,166.88, 996,711.60 and 420,538.72 is: 580,414.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,166.88 : 996,711.60 = 420,538.72 : x
  2. Step 2: Convert to fraction form
    722,166.88/996,711.60 = 420,538.72/x
  3. Step 3: Cross multiply
    722,166.88x = 996,711.60 × 420,538.72
  4. Step 4: Simplify right side
    722,166.88x = 419,155,820,473.15
  5. Step 5: Solve for x
    x = 419,155,820,473.15/722,166.88
  6. Step 6: Final answer
    x = 580,414.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.