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Finding the Fourth Proportional to 2,777.57, 4,165.97 and 928.64

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Solution

The fourth proportional to 2,777.57, 4,165.97 and 928.64 is: 1,392.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.57 : 4,165.97 = 928.64 : x
  2. Step 2: Convert to fraction form
    2,777.57/4,165.97 = 928.64/x
  3. Step 3: Cross multiply
    2,777.57x = 4,165.97 × 928.64
  4. Step 4: Simplify right side
    2,777.57x = 3,868,686.38
  5. Step 5: Solve for x
    x = 3,868,686.38/2,777.57
  6. Step 6: Final answer
    x = 1,392.83

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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.