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Finding the Fourth Proportional to 318.60, 477.86 and 264.83

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Solution

The fourth proportional to 318.60, 477.86 and 264.83 is: 397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.60 : 477.86 = 264.83 : x
  2. Step 2: Convert to fraction form
    318.60/477.86 = 264.83/x
  3. Step 3: Cross multiply
    318.60x = 477.86 × 264.83
  4. Step 4: Simplify right side
    318.60x = 126,547.95
  5. Step 5: Solve for x
    x = 126,547.95/318.60
  6. Step 6: Final answer
    x = 397.20

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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.