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Finding the Fourth Proportional to 555.87, 833.28 and 321.18

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Solution

The fourth proportional to 555.87, 833.28 and 321.18 is: 481.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.87 : 833.28 = 321.18 : x
  2. Step 2: Convert to fraction form
    555.87/833.28 = 321.18/x
  3. Step 3: Cross multiply
    555.87x = 833.28 × 321.18
  4. Step 4: Simplify right side
    555.87x = 267,632.87
  5. Step 5: Solve for x
    x = 267,632.87/555.87
  6. Step 6: Final answer
    x = 481.47

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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.