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Finding the Fourth Proportional to 2,165.09, 3,247.92 and 778.14

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Solution

The fourth proportional to 2,165.09, 3,247.92 and 778.14 is: 1,167.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.09 : 3,247.92 = 778.14 : x
  2. Step 2: Convert to fraction form
    2,165.09/3,247.92 = 778.14/x
  3. Step 3: Cross multiply
    2,165.09x = 3,247.92 × 778.14
  4. Step 4: Simplify right side
    2,165.09x = 2,527,336.47
  5. Step 5: Solve for x
    x = 2,527,336.47/2,165.09
  6. Step 6: Final answer
    x = 1,167.32

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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.