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Finding the Fourth Proportional to 320.32, 480.35 and 100.87

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Solution

The fourth proportional to 320.32, 480.35 and 100.87 is: 151.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.32 : 480.35 = 100.87 : x
  2. Step 2: Convert to fraction form
    320.32/480.35 = 100.87/x
  3. Step 3: Cross multiply
    320.32x = 480.35 × 100.87
  4. Step 4: Simplify right side
    320.32x = 48,452.90
  5. Step 5: Solve for x
    x = 48,452.90/320.32
  6. Step 6: Final answer
    x = 151.26

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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.