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Finding the Fourth Proportional to 1,079.19, 1,620.26 and 559.55

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Solution

The fourth proportional to 1,079.19, 1,620.26 and 559.55 is: 840.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.19 : 1,620.26 = 559.55 : x
  2. Step 2: Convert to fraction form
    1,079.19/1,620.26 = 559.55/x
  3. Step 3: Cross multiply
    1,079.19x = 1,620.26 × 559.55
  4. Step 4: Simplify right side
    1,079.19x = 906,616.48
  5. Step 5: Solve for x
    x = 906,616.48/1,079.19
  6. Step 6: Final answer
    x = 840.09

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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.