Home / 1,531.38-2,105.16-1,317.90

Finding the Fourth Proportional to 1,531.38, 2,105.16 and 1,317.90

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Solution

The fourth proportional to 1,531.38, 2,105.16 and 1,317.90 is: 1,811.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.38 : 2,105.16 = 1,317.90 : x
  2. Step 2: Convert to fraction form
    1,531.38/2,105.16 = 1,317.90/x
  3. Step 3: Cross multiply
    1,531.38x = 2,105.16 × 1,317.90
  4. Step 4: Simplify right side
    1,531.38x = 2,774,390.36
  5. Step 5: Solve for x
    x = 2,774,390.36/1,531.38
  6. Step 6: Final answer
    x = 1,811.69

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.