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Finding the Fourth Proportional to 1,863.72, 2,572.16 and 1,077.75

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Solution

The fourth proportional to 1,863.72, 2,572.16 and 1,077.75 is: 1,487.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.72 : 2,572.16 = 1,077.75 : x
  2. Step 2: Convert to fraction form
    1,863.72/2,572.16 = 1,077.75/x
  3. Step 3: Cross multiply
    1,863.72x = 2,572.16 × 1,077.75
  4. Step 4: Simplify right side
    1,863.72x = 2,772,140.05
  5. Step 5: Solve for x
    x = 2,772,140.05/1,863.72
  6. Step 6: Final answer
    x = 1,487.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.