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Finding the Fourth Proportional to 695.62, 1,043.44 and 478.54

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Solution

The fourth proportional to 695.62, 1,043.44 and 478.54 is: 717.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.62 : 1,043.44 = 478.54 : x
  2. Step 2: Convert to fraction form
    695.62/1,043.44 = 478.54/x
  3. Step 3: Cross multiply
    695.62x = 1,043.44 × 478.54
  4. Step 4: Simplify right side
    695.62x = 499,327.78
  5. Step 5: Solve for x
    x = 499,327.78/695.62
  6. Step 6: Final answer
    x = 717.82

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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.