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Finding the Fourth Proportional to 695.28, 959.55 and 400.65

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Solution

The fourth proportional to 695.28, 959.55 and 400.65 is: 552.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.28 : 959.55 = 400.65 : x
  2. Step 2: Convert to fraction form
    695.28/959.55 = 400.65/x
  3. Step 3: Cross multiply
    695.28x = 959.55 × 400.65
  4. Step 4: Simplify right side
    695.28x = 384,438.61
  5. Step 5: Solve for x
    x = 384,438.61/695.28
  6. Step 6: Final answer
    x = 552.92

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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.