Home / 2,092.76-3,139.40-631.90

Finding the Fourth Proportional to 2,092.76, 3,139.40 and 631.90

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Solution

The fourth proportional to 2,092.76, 3,139.40 and 631.90 is: 947.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.76 : 3,139.40 = 631.90 : x
  2. Step 2: Convert to fraction form
    2,092.76/3,139.40 = 631.90/x
  3. Step 3: Cross multiply
    2,092.76x = 3,139.40 × 631.90
  4. Step 4: Simplify right side
    2,092.76x = 1,983,786.86
  5. Step 5: Solve for x
    x = 1,983,786.86/2,092.76
  6. Step 6: Final answer
    x = 947.93

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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.