Home / 1,388.85-2,079.57-1,146.45

Finding the Fourth Proportional to 1,388.85, 2,079.57 and 1,146.45

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Solution

The fourth proportional to 1,388.85, 2,079.57 and 1,146.45 is: 1,716.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.85 : 2,079.57 = 1,146.45 : x
  2. Step 2: Convert to fraction form
    1,388.85/2,079.57 = 1,146.45/x
  3. Step 3: Cross multiply
    1,388.85x = 2,079.57 × 1,146.45
  4. Step 4: Simplify right side
    1,388.85x = 2,384,135.12
  5. Step 5: Solve for x
    x = 2,384,135.12/1,388.85
  6. Step 6: Final answer
    x = 1,716.63

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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.