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Finding the Fourth Proportional to 5,253.86, 7,880.79 and 2,912.76

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Solution

The fourth proportional to 5,253.86, 7,880.79 and 2,912.76 is: 4,369.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,253.86 : 7,880.79 = 2,912.76 : x
  2. Step 2: Convert to fraction form
    5,253.86/7,880.79 = 2,912.76/x
  3. Step 3: Cross multiply
    5,253.86x = 7,880.79 × 2,912.76
  4. Step 4: Simplify right side
    5,253.86x = 22,954,860.80
  5. Step 5: Solve for x
    x = 22,954,860.80/5,253.86
  6. Step 6: Final answer
    x = 4,369.14

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.