Home / 2,152.98-3,230.28-1,287.90

Finding the Fourth Proportional to 2,152.98, 3,230.28 and 1,287.90

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Solution

The fourth proportional to 2,152.98, 3,230.28 and 1,287.90 is: 1,932.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.98 : 3,230.28 = 1,287.90 : x
  2. Step 2: Convert to fraction form
    2,152.98/3,230.28 = 1,287.90/x
  3. Step 3: Cross multiply
    2,152.98x = 3,230.28 × 1,287.90
  4. Step 4: Simplify right side
    2,152.98x = 4,160,277.61
  5. Step 5: Solve for x
    x = 4,160,277.61/2,152.98
  6. Step 6: Final answer
    x = 1,932.33

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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.