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Finding the Fourth Proportional to 320.76, 483.27 and 318.03

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Solution

The fourth proportional to 320.76, 483.27 and 318.03 is: 479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.76 : 483.27 = 318.03 : x
  2. Step 2: Convert to fraction form
    320.76/483.27 = 318.03/x
  3. Step 3: Cross multiply
    320.76x = 483.27 × 318.03
  4. Step 4: Simplify right side
    320.76x = 153,691.35
  5. Step 5: Solve for x
    x = 153,691.35/320.76
  6. Step 6: Final answer
    x = 479.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.