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Finding the Fourth Proportional to 667.32, 915.94 and 611.94

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Solution

The fourth proportional to 667.32, 915.94 and 611.94 is: 839.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.32 : 915.94 = 611.94 : x
  2. Step 2: Convert to fraction form
    667.32/915.94 = 611.94/x
  3. Step 3: Cross multiply
    667.32x = 915.94 × 611.94
  4. Step 4: Simplify right side
    667.32x = 560,500.32
  5. Step 5: Solve for x
    x = 560,500.32/667.32
  6. Step 6: Final answer
    x = 839.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.