Home / 1,987.87-2,981.46-527.17

Finding the Fourth Proportional to 1,987.87, 2,981.46 and 527.17

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Solution

The fourth proportional to 1,987.87, 2,981.46 and 527.17 is: 790.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.87 : 2,981.46 = 527.17 : x
  2. Step 2: Convert to fraction form
    1,987.87/2,981.46 = 527.17/x
  3. Step 3: Cross multiply
    1,987.87x = 2,981.46 × 527.17
  4. Step 4: Simplify right side
    1,987.87x = 1,571,736.27
  5. Step 5: Solve for x
    x = 1,571,736.27/1,987.87
  6. Step 6: Final answer
    x = 790.66

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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.