Home / 1,981.88-2,972.07-1,590.92

Finding the Fourth Proportional to 1,981.88, 2,972.07 and 1,590.92

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Solution

The fourth proportional to 1,981.88, 2,972.07 and 1,590.92 is: 2,385.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.88 : 2,972.07 = 1,590.92 : x
  2. Step 2: Convert to fraction form
    1,981.88/2,972.07 = 1,590.92/x
  3. Step 3: Cross multiply
    1,981.88x = 2,972.07 × 1,590.92
  4. Step 4: Simplify right side
    1,981.88x = 4,728,310.74
  5. Step 5: Solve for x
    x = 4,728,310.74/1,981.88
  6. Step 6: Final answer
    x = 2,385.78

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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.