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Finding the Fourth Proportional to 2,580.59, 3,870.11 and 731.86

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Solution

The fourth proportional to 2,580.59, 3,870.11 and 731.86 is: 1,097.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.59 : 3,870.11 = 731.86 : x
  2. Step 2: Convert to fraction form
    2,580.59/3,870.11 = 731.86/x
  3. Step 3: Cross multiply
    2,580.59x = 3,870.11 × 731.86
  4. Step 4: Simplify right side
    2,580.59x = 2,832,370.86
  5. Step 5: Solve for x
    x = 2,832,370.86/2,580.59
  6. Step 6: Final answer
    x = 1,097.57

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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.