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Finding the Fourth Proportional to 555.57, 833.12 and 247.21

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Solution

The fourth proportional to 555.57, 833.12 and 247.21 is: 370.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.57 : 833.12 = 247.21 : x
  2. Step 2: Convert to fraction form
    555.57/833.12 = 247.21/x
  3. Step 3: Cross multiply
    555.57x = 833.12 × 247.21
  4. Step 4: Simplify right side
    555.57x = 205,956.33
  5. Step 5: Solve for x
    x = 205,956.33/555.57
  6. Step 6: Final answer
    x = 370.71

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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.