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Finding the Fourth Proportional to 667.32, 920.52 and 543.12

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Solution

The fourth proportional to 667.32, 920.52 and 543.12 is: 749.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.32 : 920.52 = 543.12 : x
  2. Step 2: Convert to fraction form
    667.32/920.52 = 543.12/x
  3. Step 3: Cross multiply
    667.32x = 920.52 × 543.12
  4. Step 4: Simplify right side
    667.32x = 499,952.82
  5. Step 5: Solve for x
    x = 499,952.82/667.32
  6. Step 6: Final answer
    x = 749.20

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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.