Home / 1,787.42-2,679.63-1,240.67

Finding the Fourth Proportional to 1,787.42, 2,679.63 and 1,240.67

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Solution

The fourth proportional to 1,787.42, 2,679.63 and 1,240.67 is: 1,859.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.42 : 2,679.63 = 1,240.67 : x
  2. Step 2: Convert to fraction form
    1,787.42/2,679.63 = 1,240.67/x
  3. Step 3: Cross multiply
    1,787.42x = 2,679.63 × 1,240.67
  4. Step 4: Simplify right side
    1,787.42x = 3,324,523.15
  5. Step 5: Solve for x
    x = 3,324,523.15/1,787.42
  6. Step 6: Final answer
    x = 1,859.96

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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.