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Finding the Fourth Proportional to 463.68, 695.64 and 139.05

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Solution

The fourth proportional to 463.68, 695.64 and 139.05 is: 208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.68 : 695.64 = 139.05 : x
  2. Step 2: Convert to fraction form
    463.68/695.64 = 139.05/x
  3. Step 3: Cross multiply
    463.68x = 695.64 × 139.05
  4. Step 4: Simplify right side
    463.68x = 96,728.74
  5. Step 5: Solve for x
    x = 96,728.74/463.68
  6. Step 6: Final answer
    x = 208.61

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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.