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Finding the Fourth Proportional to 2,753.88, 4,130.10 and 779.40

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Solution

The fourth proportional to 2,753.88, 4,130.10 and 779.40 is: 1,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.88 : 4,130.10 = 779.40 : x
  2. Step 2: Convert to fraction form
    2,753.88/4,130.10 = 779.40/x
  3. Step 3: Cross multiply
    2,753.88x = 4,130.10 × 779.40
  4. Step 4: Simplify right side
    2,753.88x = 3,218,999.94
  5. Step 5: Solve for x
    x = 3,218,999.94/2,753.88
  6. Step 6: Final answer
    x = 1,168.90

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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.