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Finding the Fourth Proportional to 1,160.76, 1,601.90 and 636.81

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Solution

The fourth proportional to 1,160.76, 1,601.90 and 636.81 is: 878.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.76 : 1,601.90 = 636.81 : x
  2. Step 2: Convert to fraction form
    1,160.76/1,601.90 = 636.81/x
  3. Step 3: Cross multiply
    1,160.76x = 1,601.90 × 636.81
  4. Step 4: Simplify right side
    1,160.76x = 1,020,102.75
  5. Step 5: Solve for x
    x = 1,020,102.75/1,160.76
  6. Step 6: Final answer
    x = 878.82

Related Problems

Find fourth proportional to 580.38, 800.95 and 318.41
Half scale
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Double 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.