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Finding the Fourth Proportional to 934.12, 1,402.09 and 712.67

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Solution

The fourth proportional to 934.12, 1,402.09 and 712.67 is: 1,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.12 : 1,402.09 = 712.67 : x
  2. Step 2: Convert to fraction form
    934.12/1,402.09 = 712.67/x
  3. Step 3: Cross multiply
    934.12x = 1,402.09 × 712.67
  4. Step 4: Simplify right side
    934.12x = 999,229.20
  5. Step 5: Solve for x
    x = 999,229.20/934.12
  6. Step 6: Final answer
    x = 1,069.70

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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.