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Finding the Fourth Proportional to 1,160.72, 1,601.85 and 636.75

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Solution

The fourth proportional to 1,160.72, 1,601.85 and 636.75 is: 878.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.72 : 1,601.85 = 636.75 : x
  2. Step 2: Convert to fraction form
    1,160.72/1,601.85 = 636.75/x
  3. Step 3: Cross multiply
    1,160.72x = 1,601.85 × 636.75
  4. Step 4: Simplify right side
    1,160.72x = 1,019,977.99
  5. Step 5: Solve for x
    x = 1,019,977.99/1,160.72
  6. Step 6: Final answer
    x = 878.75

Related Problems

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Half scale
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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.