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Finding the Fourth Proportional to 679.42, 938.57 and 531.34

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Solution

The fourth proportional to 679.42, 938.57 and 531.34 is: 734.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.42 : 938.57 = 531.34 : x
  2. Step 2: Convert to fraction form
    679.42/938.57 = 531.34/x
  3. Step 3: Cross multiply
    679.42x = 938.57 × 531.34
  4. Step 4: Simplify right side
    679.42x = 498,705.44
  5. Step 5: Solve for x
    x = 498,705.44/679.42
  6. Step 6: Final answer
    x = 734.01

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1.5x scale

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.