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Finding the Fourth Proportional to 691.05, 952.97 and 612.39

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Solution

The fourth proportional to 691.05, 952.97 and 612.39 is: 844.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.05 : 952.97 = 612.39 : x
  2. Step 2: Convert to fraction form
    691.05/952.97 = 612.39/x
  3. Step 3: Cross multiply
    691.05x = 952.97 × 612.39
  4. Step 4: Simplify right side
    691.05x = 583,586.24
  5. Step 5: Solve for x
    x = 583,586.24/691.05
  6. Step 6: Final answer
    x = 844.49

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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.