Home / 1,079.11-1,618.27-385.59

Finding the Fourth Proportional to 1,079.11, 1,618.27 and 385.59

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Solution

The fourth proportional to 1,079.11, 1,618.27 and 385.59 is: 578.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.11 : 1,618.27 = 385.59 : x
  2. Step 2: Convert to fraction form
    1,079.11/1,618.27 = 385.59/x
  3. Step 3: Cross multiply
    1,079.11x = 1,618.27 × 385.59
  4. Step 4: Simplify right side
    1,079.11x = 623,993.83
  5. Step 5: Solve for x
    x = 623,993.83/1,079.11
  6. Step 6: Final answer
    x = 578.25

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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.