Home / 1,531.40-2,110.20-1,266.80

Finding the Fourth Proportional to 1,531.40, 2,110.20 and 1,266.80

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Solution

The fourth proportional to 1,531.40, 2,110.20 and 1,266.80 is: 1,745.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.40 : 2,110.20 = 1,266.80 : x
  2. Step 2: Convert to fraction form
    1,531.40/2,110.20 = 1,266.80/x
  3. Step 3: Cross multiply
    1,531.40x = 2,110.20 × 1,266.80
  4. Step 4: Simplify right side
    1,531.40x = 2,673,201.36
  5. Step 5: Solve for x
    x = 2,673,201.36/1,531.40
  6. Step 6: Final answer
    x = 1,745.59

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1.5x scale

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.