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Finding the Fourth Proportional to 2,873.80, 4,311.15 and 925.75

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Solution

The fourth proportional to 2,873.80, 4,311.15 and 925.75 is: 1,388.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,873.80 : 4,311.15 = 925.75 : x
  2. Step 2: Convert to fraction form
    2,873.80/4,311.15 = 925.75/x
  3. Step 3: Cross multiply
    2,873.80x = 4,311.15 × 925.75
  4. Step 4: Simplify right side
    2,873.80x = 3,991,047.11
  5. Step 5: Solve for x
    x = 3,991,047.11/2,873.80
  6. Step 6: Final answer
    x = 1,388.77

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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.