Home / 2,178.72-3,261.60-1,742.40

Finding the Fourth Proportional to 2,178.72, 3,261.60 and 1,742.40

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Solution

The fourth proportional to 2,178.72, 3,261.60 and 1,742.40 is: 2,608.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.72 : 3,261.60 = 1,742.40 : x
  2. Step 2: Convert to fraction form
    2,178.72/3,261.60 = 1,742.40/x
  3. Step 3: Cross multiply
    2,178.72x = 3,261.60 × 1,742.40
  4. Step 4: Simplify right side
    2,178.72x = 5,683,011.84
  5. Step 5: Solve for x
    x = 5,683,011.84/2,178.72
  6. Step 6: Final answer
    x = 2,608.42

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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.