Home / 1,311.48-1,965.84-1,243.13

Finding the Fourth Proportional to 1,311.48, 1,965.84 and 1,243.13

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Solution

The fourth proportional to 1,311.48, 1,965.84 and 1,243.13 is: 1,863.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.48 : 1,965.84 = 1,243.13 : x
  2. Step 2: Convert to fraction form
    1,311.48/1,965.84 = 1,243.13/x
  3. Step 3: Cross multiply
    1,311.48x = 1,965.84 × 1,243.13
  4. Step 4: Simplify right side
    1,311.48x = 2,443,784.85
  5. Step 5: Solve for x
    x = 2,443,784.85/1,311.48
  6. Step 6: Final answer
    x = 1,863.38

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1.5x scale

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.