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Finding the Fourth Proportional to 868.88, 1,303.54 and 321.22

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Solution

The fourth proportional to 868.88, 1,303.54 and 321.22 is: 481.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.88 : 1,303.54 = 321.22 : x
  2. Step 2: Convert to fraction form
    868.88/1,303.54 = 321.22/x
  3. Step 3: Cross multiply
    868.88x = 1,303.54 × 321.22
  4. Step 4: Simplify right side
    868.88x = 418,718.42
  5. Step 5: Solve for x
    x = 418,718.42/868.88
  6. Step 6: Final answer
    x = 481.91

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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.