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Finding the Fourth Proportional to 695.06, 1,043.78 and 617.15

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Solution

The fourth proportional to 695.06, 1,043.78 and 617.15 is: 926.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.06 : 1,043.78 = 617.15 : x
  2. Step 2: Convert to fraction form
    695.06/1,043.78 = 617.15/x
  3. Step 3: Cross multiply
    695.06x = 1,043.78 × 617.15
  4. Step 4: Simplify right side
    695.06x = 644,162.84
  5. Step 5: Solve for x
    x = 644,162.84/695.06
  6. Step 6: Final answer
    x = 926.78

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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.