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Finding the Fourth Proportional to 2,091.40, 3,137.08 and 531.41

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Solution

The fourth proportional to 2,091.40, 3,137.08 and 531.41 is: 797.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.40 : 3,137.08 = 531.41 : x
  2. Step 2: Convert to fraction form
    2,091.40/3,137.08 = 531.41/x
  3. Step 3: Cross multiply
    2,091.40x = 3,137.08 × 531.41
  4. Step 4: Simplify right side
    2,091.40x = 1,667,060.00
  5. Step 5: Solve for x
    x = 1,667,060.00/2,091.40
  6. Step 6: Final answer
    x = 797.10

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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.