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Finding the Fourth Proportional to 556.28, 833.12 and 281.70

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Solution

The fourth proportional to 556.28, 833.12 and 281.70 is: 421.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.28 : 833.12 = 281.70 : x
  2. Step 2: Convert to fraction form
    556.28/833.12 = 281.70/x
  3. Step 3: Cross multiply
    556.28x = 833.12 × 281.70
  4. Step 4: Simplify right side
    556.28x = 234,689.90
  5. Step 5: Solve for x
    x = 234,689.90/556.28
  6. Step 6: Final answer
    x = 421.89

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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.