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Finding the Fourth Proportional to 480.10, 718.92 and 387.76

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Solution

The fourth proportional to 480.10, 718.92 and 387.76 is: 580.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.10 : 718.92 = 387.76 : x
  2. Step 2: Convert to fraction form
    480.10/718.92 = 387.76/x
  3. Step 3: Cross multiply
    480.10x = 718.92 × 387.76
  4. Step 4: Simplify right side
    480.10x = 278,768.42
  5. Step 5: Solve for x
    x = 278,768.42/480.10
  6. Step 6: Final answer
    x = 580.65

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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.