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Finding the Fourth Proportional to 856.28, 1,181.66 and 669.96

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Solution

The fourth proportional to 856.28, 1,181.66 and 669.96 is: 924.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.28 : 1,181.66 = 669.96 : x
  2. Step 2: Convert to fraction form
    856.28/1,181.66 = 669.96/x
  3. Step 3: Cross multiply
    856.28x = 1,181.66 × 669.96
  4. Step 4: Simplify right side
    856.28x = 791,664.93
  5. Step 5: Solve for x
    x = 791,664.93/856.28
  6. Step 6: Final answer
    x = 924.54

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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.