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Finding the Fourth Proportional to 320.49, 480.67 and 125.35

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Solution

The fourth proportional to 320.49, 480.67 and 125.35 is: 187.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.49 : 480.67 = 125.35 : x
  2. Step 2: Convert to fraction form
    320.49/480.67 = 125.35/x
  3. Step 3: Cross multiply
    320.49x = 480.67 × 125.35
  4. Step 4: Simplify right side
    320.49x = 60,250.47
  5. Step 5: Solve for x
    x = 60,250.47/320.49
  6. Step 6: Final answer
    x = 187.99

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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.