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Finding the Fourth Proportional to 695.20, 958.80 and 653.44

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Solution

The fourth proportional to 695.20, 958.80 and 653.44 is: 901.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.20 : 958.80 = 653.44 : x
  2. Step 2: Convert to fraction form
    695.20/958.80 = 653.44/x
  3. Step 3: Cross multiply
    695.20x = 958.80 × 653.44
  4. Step 4: Simplify right side
    695.20x = 626,518.27
  5. Step 5: Solve for x
    x = 626,518.27/695.20
  6. Step 6: Final answer
    x = 901.21

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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.