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Finding the Fourth Proportional to 2,129.40, 3,193.02 and 974.52

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Solution

The fourth proportional to 2,129.40, 3,193.02 and 974.52 is: 1,461.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.40 : 3,193.02 = 974.52 : x
  2. Step 2: Convert to fraction form
    2,129.40/3,193.02 = 974.52/x
  3. Step 3: Cross multiply
    2,129.40x = 3,193.02 × 974.52
  4. Step 4: Simplify right side
    2,129.40x = 3,111,661.85
  5. Step 5: Solve for x
    x = 3,111,661.85/2,129.40
  6. Step 6: Final answer
    x = 1,461.29

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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.