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Finding the Fourth Proportional to 320.57, 480.78 and 104.10

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Solution

The fourth proportional to 320.57, 480.78 and 104.10 is: 156.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.57 : 480.78 = 104.10 : x
  2. Step 2: Convert to fraction form
    320.57/480.78 = 104.10/x
  3. Step 3: Cross multiply
    320.57x = 480.78 × 104.10
  4. Step 4: Simplify right side
    320.57x = 50,049.20
  5. Step 5: Solve for x
    x = 50,049.20/320.57
  6. Step 6: Final answer
    x = 156.13

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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.