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Finding the Fourth Proportional to 2,165.50, 3,248.82 and 779.14

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Solution

The fourth proportional to 2,165.50, 3,248.82 and 779.14 is: 1,168.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.50 : 3,248.82 = 779.14 : x
  2. Step 2: Convert to fraction form
    2,165.50/3,248.82 = 779.14/x
  3. Step 3: Cross multiply
    2,165.50x = 3,248.82 × 779.14
  4. Step 4: Simplify right side
    2,165.50x = 2,531,285.61
  5. Step 5: Solve for x
    x = 2,531,285.61/2,165.50
  6. Step 6: Final answer
    x = 1,168.92

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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.