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Finding the Fourth Proportional to 867.92, 1,301.18 and 320.49

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Solution

The fourth proportional to 867.92, 1,301.18 and 320.49 is: 480.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.92 : 1,301.18 = 320.49 : x
  2. Step 2: Convert to fraction form
    867.92/1,301.18 = 320.49/x
  3. Step 3: Cross multiply
    867.92x = 1,301.18 × 320.49
  4. Step 4: Simplify right side
    867.92x = 417,013.58
  5. Step 5: Solve for x
    x = 417,013.58/867.92
  6. Step 6: Final answer
    x = 480.48

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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.