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Finding the Fourth Proportional to 320.04, 480.42 and 127.62

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Solution

The fourth proportional to 320.04, 480.42 and 127.62 is: 191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.04 : 480.42 = 127.62 : x
  2. Step 2: Convert to fraction form
    320.04/480.42 = 127.62/x
  3. Step 3: Cross multiply
    320.04x = 480.42 × 127.62
  4. Step 4: Simplify right side
    320.04x = 61,311.20
  5. Step 5: Solve for x
    x = 61,311.20/320.04
  6. Step 6: Final answer
    x = 191.57

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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.