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Finding the Fourth Proportional to 935.67, 1,291.12 and 516

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Solution

The fourth proportional to 935.67, 1,291.12 and 516 is: 712.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.67 : 1,291.12 = 516 : x
  2. Step 2: Convert to fraction form
    935.67/1,291.12 = 516/x
  3. Step 3: Cross multiply
    935.67x = 1,291.12 × 516
  4. Step 4: Simplify right side
    935.67x = 666,217.92
  5. Step 5: Solve for x
    x = 666,217.92/935.67
  6. Step 6: Final answer
    x = 712.02

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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.