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Finding the Fourth Proportional to 480.93, 721.12 and 315.69

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Solution

The fourth proportional to 480.93, 721.12 and 315.69 is: 473.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.93 : 721.12 = 315.69 : x
  2. Step 2: Convert to fraction form
    480.93/721.12 = 315.69/x
  3. Step 3: Cross multiply
    480.93x = 721.12 × 315.69
  4. Step 4: Simplify right side
    480.93x = 227,650.37
  5. Step 5: Solve for x
    x = 227,650.37/480.93
  6. Step 6: Final answer
    x = 473.35

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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.