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Finding the Fourth Proportional to 667.67, 926.10 and 645.53

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Solution

The fourth proportional to 667.67, 926.10 and 645.53 is: 895.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.67 : 926.10 = 645.53 : x
  2. Step 2: Convert to fraction form
    667.67/926.10 = 645.53/x
  3. Step 3: Cross multiply
    667.67x = 926.10 × 645.53
  4. Step 4: Simplify right side
    667.67x = 597,820.70
  5. Step 5: Solve for x
    x = 597,820.70/667.67
  6. Step 6: Final answer
    x = 895.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.