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Finding the Fourth Proportional to 2,591.73, 3,885.29 and 947.12

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Solution

The fourth proportional to 2,591.73, 3,885.29 and 947.12 is: 1,419.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,591.73 : 3,885.29 = 947.12 : x
  2. Step 2: Convert to fraction form
    2,591.73/3,885.29 = 947.12/x
  3. Step 3: Cross multiply
    2,591.73x = 3,885.29 × 947.12
  4. Step 4: Simplify right side
    2,591.73x = 3,679,811.70
  5. Step 5: Solve for x
    x = 3,679,811.70/2,591.73
  6. Step 6: Final answer
    x = 1,419.83

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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.