Home / 1,387.68-2,069.75-1,169.74

Finding the Fourth Proportional to 1,387.68, 2,069.75 and 1,169.74

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Solution

The fourth proportional to 1,387.68, 2,069.75 and 1,169.74 is: 1,744.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.68 : 2,069.75 = 1,169.74 : x
  2. Step 2: Convert to fraction form
    1,387.68/2,069.75 = 1,169.74/x
  3. Step 3: Cross multiply
    1,387.68x = 2,069.75 × 1,169.74
  4. Step 4: Simplify right side
    1,387.68x = 2,421,074.88
  5. Step 5: Solve for x
    x = 2,421,074.88/1,387.68
  6. Step 6: Final answer
    x = 1,744.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.