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Finding the Fourth Proportional to 817.98, 1,125.81 and 651.66

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Solution

The fourth proportional to 817.98, 1,125.81 and 651.66 is: 896.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.98 : 1,125.81 = 651.66 : x
  2. Step 2: Convert to fraction form
    817.98/1,125.81 = 651.66/x
  3. Step 3: Cross multiply
    817.98x = 1,125.81 × 651.66
  4. Step 4: Simplify right side
    817.98x = 733,645.34
  5. Step 5: Solve for x
    x = 733,645.34/817.98
  6. Step 6: Final answer
    x = 896.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.