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Finding the Fourth Proportional to 472.76, 708.91 and 308.20

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Solution

The fourth proportional to 472.76, 708.91 and 308.20 is: 462.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.76 : 708.91 = 308.20 : x
  2. Step 2: Convert to fraction form
    472.76/708.91 = 308.20/x
  3. Step 3: Cross multiply
    472.76x = 708.91 × 308.20
  4. Step 4: Simplify right side
    472.76x = 218,486.06
  5. Step 5: Solve for x
    x = 218,486.06/472.76
  6. Step 6: Final answer
    x = 462.15

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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.