Home / 1,177.91-1,636.42-1,167.20

Finding the Fourth Proportional to 1,177.91, 1,636.42 and 1,167.20

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Solution

The fourth proportional to 1,177.91, 1,636.42 and 1,167.20 is: 1,621.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.91 : 1,636.42 = 1,167.20 : x
  2. Step 2: Convert to fraction form
    1,177.91/1,636.42 = 1,167.20/x
  3. Step 3: Cross multiply
    1,177.91x = 1,636.42 × 1,167.20
  4. Step 4: Simplify right side
    1,177.91x = 1,910,029.42
  5. Step 5: Solve for x
    x = 1,910,029.42/1,177.91
  6. Step 6: Final answer
    x = 1,621.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.