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Finding the Fourth Proportional to 695.20, 959.36 and 400.45

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Solution

The fourth proportional to 695.20, 959.36 and 400.45 is: 552.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.20 : 959.36 = 400.45 : x
  2. Step 2: Convert to fraction form
    695.20/959.36 = 400.45/x
  3. Step 3: Cross multiply
    695.20x = 959.36 × 400.45
  4. Step 4: Simplify right side
    695.20x = 384,173.71
  5. Step 5: Solve for x
    x = 384,173.71/695.20
  6. Step 6: Final answer
    x = 552.61

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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.