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Finding the Fourth Proportional to 2,165.44, 3,248.79 and 778.75

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Solution

The fourth proportional to 2,165.44, 3,248.79 and 778.75 is: 1,168.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.44 : 3,248.79 = 778.75 : x
  2. Step 2: Convert to fraction form
    2,165.44/3,248.79 = 778.75/x
  3. Step 3: Cross multiply
    2,165.44x = 3,248.79 × 778.75
  4. Step 4: Simplify right side
    2,165.44x = 2,529,988.55
  5. Step 5: Solve for x
    x = 2,529,988.55/2,165.44
  6. Step 6: Final answer
    x = 1,168.35

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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.