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Finding the Fourth Proportional to 480.48, 721.88 and 307.49

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Solution

The fourth proportional to 480.48, 721.88 and 307.49 is: 461.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.48 : 721.88 = 307.49 : x
  2. Step 2: Convert to fraction form
    480.48/721.88 = 307.49/x
  3. Step 3: Cross multiply
    480.48x = 721.88 × 307.49
  4. Step 4: Simplify right side
    480.48x = 221,968.05
  5. Step 5: Solve for x
    x = 221,968.05/480.48
  6. Step 6: Final answer
    x = 461.97

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Double scale
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1.5x scale

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.