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Finding the Fourth Proportional to 856.17, 1,181.79 and 541.49

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Solution

The fourth proportional to 856.17, 1,181.79 and 541.49 is: 747.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.17 : 1,181.79 = 541.49 : x
  2. Step 2: Convert to fraction form
    856.17/1,181.79 = 541.49/x
  3. Step 3: Cross multiply
    856.17x = 1,181.79 × 541.49
  4. Step 4: Simplify right side
    856.17x = 639,921.56
  5. Step 5: Solve for x
    x = 639,921.56/856.17
  6. Step 6: Final answer
    x = 747.42

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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.