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Finding the Fourth Proportional to 716.68, 1,073.58 and 427.96

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Solution

The fourth proportional to 716.68, 1,073.58 and 427.96 is: 641.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.68 : 1,073.58 = 427.96 : x
  2. Step 2: Convert to fraction form
    716.68/1,073.58 = 427.96/x
  3. Step 3: Cross multiply
    716.68x = 1,073.58 × 427.96
  4. Step 4: Simplify right side
    716.68x = 459,449.30
  5. Step 5: Solve for x
    x = 459,449.30/716.68
  6. Step 6: Final answer
    x = 641.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.