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Finding the Fourth Proportional to 3,108.70, 4,661.70 and 1,027.90

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Solution

The fourth proportional to 3,108.70, 4,661.70 and 1,027.90 is: 1,541.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.70 : 4,661.70 = 1,027.90 : x
  2. Step 2: Convert to fraction form
    3,108.70/4,661.70 = 1,027.90/x
  3. Step 3: Cross multiply
    3,108.70x = 4,661.70 × 1,027.90
  4. Step 4: Simplify right side
    3,108.70x = 4,791,761.43
  5. Step 5: Solve for x
    x = 4,791,761.43/3,108.70
  6. Step 6: Final answer
    x = 1,541.40

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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.