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Finding the Fourth Proportional to 868.97, 1,303.32 and 320.74

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Solution

The fourth proportional to 868.97, 1,303.32 and 320.74 is: 481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.97 : 1,303.32 = 320.74 : x
  2. Step 2: Convert to fraction form
    868.97/1,303.32 = 320.74/x
  3. Step 3: Cross multiply
    868.97x = 1,303.32 × 320.74
  4. Step 4: Simplify right side
    868.97x = 418,026.86
  5. Step 5: Solve for x
    x = 418,026.86/868.97
  6. Step 6: Final answer
    x = 481.06

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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.