Home / 1,154.20-1,727.70-1,118.20

Finding the Fourth Proportional to 1,154.20, 1,727.70 and 1,118.20

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Solution

The fourth proportional to 1,154.20, 1,727.70 and 1,118.20 is: 1,673.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.20 : 1,727.70 = 1,118.20 : x
  2. Step 2: Convert to fraction form
    1,154.20/1,727.70 = 1,118.20/x
  3. Step 3: Cross multiply
    1,154.20x = 1,727.70 × 1,118.20
  4. Step 4: Simplify right side
    1,154.20x = 1,931,914.14
  5. Step 5: Solve for x
    x = 1,931,914.14/1,154.20
  6. Step 6: Final answer
    x = 1,673.81

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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.