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Finding the Fourth Proportional to 695.90, 959.71 and 446.78

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Solution

The fourth proportional to 695.90, 959.71 and 446.78 is: 616.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.90 : 959.71 = 446.78 : x
  2. Step 2: Convert to fraction form
    695.90/959.71 = 446.78/x
  3. Step 3: Cross multiply
    695.90x = 959.71 × 446.78
  4. Step 4: Simplify right side
    695.90x = 428,779.23
  5. Step 5: Solve for x
    x = 428,779.23/695.90
  6. Step 6: Final answer
    x = 616.15

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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.