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Finding the Fourth Proportional to 966.96, 1,331.02 and 856.24

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Solution

The fourth proportional to 966.96, 1,331.02 and 856.24 is: 1,178.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.96 : 1,331.02 = 856.24 : x
  2. Step 2: Convert to fraction form
    966.96/1,331.02 = 856.24/x
  3. Step 3: Cross multiply
    966.96x = 1,331.02 × 856.24
  4. Step 4: Simplify right side
    966.96x = 1,139,672.56
  5. Step 5: Solve for x
    x = 1,139,672.56/966.96
  6. Step 6: Final answer
    x = 1,178.61

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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.