Home / 1,313.82-1,968.80-1,274.31

Finding the Fourth Proportional to 1,313.82, 1,968.80 and 1,274.31

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Solution

The fourth proportional to 1,313.82, 1,968.80 and 1,274.31 is: 1,909.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.82 : 1,968.80 = 1,274.31 : x
  2. Step 2: Convert to fraction form
    1,313.82/1,968.80 = 1,274.31/x
  3. Step 3: Cross multiply
    1,313.82x = 1,968.80 × 1,274.31
  4. Step 4: Simplify right side
    1,313.82x = 2,508,855.16
  5. Step 5: Solve for x
    x = 2,508,855.16/1,313.82
  6. Step 6: Final answer
    x = 1,909.59

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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.