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Finding the Fourth Proportional to 695.57, 959.74 and 415.90

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Solution

The fourth proportional to 695.57, 959.74 and 415.90 is: 573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.57 : 959.74 = 415.90 : x
  2. Step 2: Convert to fraction form
    695.57/959.74 = 415.90/x
  3. Step 3: Cross multiply
    695.57x = 959.74 × 415.90
  4. Step 4: Simplify right side
    695.57x = 399,152.43
  5. Step 5: Solve for x
    x = 399,152.43/695.57
  6. Step 6: Final answer
    x = 573.85

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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.