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Finding the Fourth Proportional to 463.64, 695.45 and 139.23

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Solution

The fourth proportional to 463.64, 695.45 and 139.23 is: 208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.64 : 695.45 = 139.23 : x
  2. Step 2: Convert to fraction form
    463.64/695.45 = 139.23/x
  3. Step 3: Cross multiply
    463.64x = 695.45 × 139.23
  4. Step 4: Simplify right side
    463.64x = 96,827.85
  5. Step 5: Solve for x
    x = 96,827.85/463.64
  6. Step 6: Final answer
    x = 208.85

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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.