Home / 1,144.20-1,579.26-678.36

Finding the Fourth Proportional to 1,144.20, 1,579.26 and 678.36

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Solution

The fourth proportional to 1,144.20, 1,579.26 and 678.36 is: 936.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.20 : 1,579.26 = 678.36 : x
  2. Step 2: Convert to fraction form
    1,144.20/1,579.26 = 678.36/x
  3. Step 3: Cross multiply
    1,144.20x = 1,579.26 × 678.36
  4. Step 4: Simplify right side
    1,144.20x = 1,071,306.81
  5. Step 5: Solve for x
    x = 1,071,306.81/1,144.20
  6. Step 6: Final answer
    x = 936.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.