Home / 1,079.43-1,621.09-559.79

Finding the Fourth Proportional to 1,079.43, 1,621.09 and 559.79

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Solution

The fourth proportional to 1,079.43, 1,621.09 and 559.79 is: 840.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.43 : 1,621.09 = 559.79 : x
  2. Step 2: Convert to fraction form
    1,079.43/1,621.09 = 559.79/x
  3. Step 3: Cross multiply
    1,079.43x = 1,621.09 × 559.79
  4. Step 4: Simplify right side
    1,079.43x = 907,462.51
  5. Step 5: Solve for x
    x = 907,462.51/1,079.43
  6. Step 6: Final answer
    x = 840.69

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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.