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Finding the Fourth Proportional to 463.47, 695.21 and 139.07

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Solution

The fourth proportional to 463.47, 695.21 and 139.07 is: 208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.47 : 695.21 = 139.07 : x
  2. Step 2: Convert to fraction form
    463.47/695.21 = 139.07/x
  3. Step 3: Cross multiply
    463.47x = 695.21 × 139.07
  4. Step 4: Simplify right side
    463.47x = 96,679.73
  5. Step 5: Solve for x
    x = 96,679.73/463.47
  6. Step 6: Final answer
    x = 208.60

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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.