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Finding the Fourth Proportional to 2,313.40, 3,468.82 and 774.20

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Solution

The fourth proportional to 2,313.40, 3,468.82 and 774.20 is: 1,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.40 : 3,468.82 = 774.20 : x
  2. Step 2: Convert to fraction form
    2,313.40/3,468.82 = 774.20/x
  3. Step 3: Cross multiply
    2,313.40x = 3,468.82 × 774.20
  4. Step 4: Simplify right side
    2,313.40x = 2,685,560.44
  5. Step 5: Solve for x
    x = 2,685,560.44/2,313.40
  6. Step 6: Final answer
    x = 1,160.87

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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.