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Finding the Fourth Proportional to 856.59, 1,182.38 and 636.27

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Solution

The fourth proportional to 856.59, 1,182.38 and 636.27 is: 878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.59 : 1,182.38 = 636.27 : x
  2. Step 2: Convert to fraction form
    856.59/1,182.38 = 636.27/x
  3. Step 3: Cross multiply
    856.59x = 1,182.38 × 636.27
  4. Step 4: Simplify right side
    856.59x = 752,309.74
  5. Step 5: Solve for x
    x = 752,309.74/856.59
  6. Step 6: Final answer
    x = 878.26

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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.