Home / 1,782.19-2,672.40-742.42

Finding the Fourth Proportional to 1,782.19, 2,672.40 and 742.42

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Solution

The fourth proportional to 1,782.19, 2,672.40 and 742.42 is: 1,113.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.19 : 2,672.40 = 742.42 : x
  2. Step 2: Convert to fraction form
    1,782.19/2,672.40 = 742.42/x
  3. Step 3: Cross multiply
    1,782.19x = 2,672.40 × 742.42
  4. Step 4: Simplify right side
    1,782.19x = 1,984,043.21
  5. Step 5: Solve for x
    x = 1,984,043.21/1,782.19
  6. Step 6: Final answer
    x = 1,113.26

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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.