Home / 1,691.21-2,331.08-1,131.47

Finding the Fourth Proportional to 1,691.21, 2,331.08 and 1,131.47

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Solution

The fourth proportional to 1,691.21, 2,331.08 and 1,131.47 is: 1,559.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.21 : 2,331.08 = 1,131.47 : x
  2. Step 2: Convert to fraction form
    1,691.21/2,331.08 = 1,131.47/x
  3. Step 3: Cross multiply
    1,691.21x = 2,331.08 × 1,131.47
  4. Step 4: Simplify right side
    1,691.21x = 2,637,529.77
  5. Step 5: Solve for x
    x = 2,637,529.77/1,691.21
  6. Step 6: Final answer
    x = 1,559.56

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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.