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Finding the Fourth Proportional to 517.60, 774.96 and 426.16

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Solution

The fourth proportional to 517.60, 774.96 and 426.16 is: 638.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.60 : 774.96 = 426.16 : x
  2. Step 2: Convert to fraction form
    517.60/774.96 = 426.16/x
  3. Step 3: Cross multiply
    517.60x = 774.96 × 426.16
  4. Step 4: Simplify right side
    517.60x = 330,256.95
  5. Step 5: Solve for x
    x = 330,256.95/517.60
  6. Step 6: Final answer
    x = 638.05

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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.