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Finding the Fourth Proportional to 306.72, 460 and 144.40

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Solution

The fourth proportional to 306.72, 460 and 144.40 is: 216.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.72 : 460 = 144.40 : x
  2. Step 2: Convert to fraction form
    306.72/460 = 144.40/x
  3. Step 3: Cross multiply
    306.72x = 460 × 144.40
  4. Step 4: Simplify right side
    306.72x = 66,424
  5. Step 5: Solve for x
    x = 66,424/306.72
  6. Step 6: Final answer
    x = 216.56

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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.