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Finding the Fourth Proportional to 463.38, 695.40 and 219.90

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Solution

The fourth proportional to 463.38, 695.40 and 219.90 is: 330.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.38 : 695.40 = 219.90 : x
  2. Step 2: Convert to fraction form
    463.38/695.40 = 219.90/x
  3. Step 3: Cross multiply
    463.38x = 695.40 × 219.90
  4. Step 4: Simplify right side
    463.38x = 152,918.46
  5. Step 5: Solve for x
    x = 152,918.46/463.38
  6. Step 6: Final answer
    x = 330.01

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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.