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Finding the Fourth Proportional to 463.98, 695.84 and 139.28

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Solution

The fourth proportional to 463.98, 695.84 and 139.28 is: 208.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.98 : 695.84 = 139.28 : x
  2. Step 2: Convert to fraction form
    463.98/695.84 = 139.28/x
  3. Step 3: Cross multiply
    463.98x = 695.84 × 139.28
  4. Step 4: Simplify right side
    463.98x = 96,912.42
  5. Step 5: Solve for x
    x = 96,912.42/463.98
  6. Step 6: Final answer
    x = 208.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.