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Finding the Fourth Proportional to 463.68, 695.80 and 247.40

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Solution

The fourth proportional to 463.68, 695.80 and 247.40 is: 371.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.68 : 695.80 = 247.40 : x
  2. Step 2: Convert to fraction form
    463.68/695.80 = 247.40/x
  3. Step 3: Cross multiply
    463.68x = 695.80 × 247.40
  4. Step 4: Simplify right side
    463.68x = 172,140.92
  5. Step 5: Solve for x
    x = 172,140.92/463.68
  6. Step 6: Final answer
    x = 371.25

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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.