Home / 1,261.35-1,892.34-1,240.42

Finding the Fourth Proportional to 1,261.35, 1,892.34 and 1,240.42

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Solution

The fourth proportional to 1,261.35, 1,892.34 and 1,240.42 is: 1,860.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.35 : 1,892.34 = 1,240.42 : x
  2. Step 2: Convert to fraction form
    1,261.35/1,892.34 = 1,240.42/x
  3. Step 3: Cross multiply
    1,261.35x = 1,892.34 × 1,240.42
  4. Step 4: Simplify right side
    1,261.35x = 2,347,298.75
  5. Step 5: Solve for x
    x = 2,347,298.75/1,261.35
  6. Step 6: Final answer
    x = 1,860.94

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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.