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Finding the Fourth Proportional to 676, 932.98 and 645.22

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Solution

The fourth proportional to 676, 932.98 and 645.22 is: 890.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    676 : 932.98 = 645.22 : x
  2. Step 2: Convert to fraction form
    676/932.98 = 645.22/x
  3. Step 3: Cross multiply
    676x = 932.98 × 645.22
  4. Step 4: Simplify right side
    676x = 601,977.36
  5. Step 5: Solve for x
    x = 601,977.36/676
  6. Step 6: Final answer
    x = 890.50

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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.