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Finding the Fourth Proportional to 320.04, 480.15 and 103.68

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Solution

The fourth proportional to 320.04, 480.15 and 103.68 is: 155.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.04 : 480.15 = 103.68 : x
  2. Step 2: Convert to fraction form
    320.04/480.15 = 103.68/x
  3. Step 3: Cross multiply
    320.04x = 480.15 × 103.68
  4. Step 4: Simplify right side
    320.04x = 49,781.95
  5. Step 5: Solve for x
    x = 49,781.95/320.04
  6. Step 6: Final answer
    x = 155.55

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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.