Home / 2,184.90-3,015.27-1,288.67

Finding the Fourth Proportional to 2,184.90, 3,015.27 and 1,288.67

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Solution

The fourth proportional to 2,184.90, 3,015.27 and 1,288.67 is: 1,778.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,184.90 : 3,015.27 = 1,288.67 : x
  2. Step 2: Convert to fraction form
    2,184.90/3,015.27 = 1,288.67/x
  3. Step 3: Cross multiply
    2,184.90x = 3,015.27 × 1,288.67
  4. Step 4: Simplify right side
    2,184.90x = 3,885,672.91
  5. Step 5: Solve for x
    x = 3,885,672.91/2,184.90
  6. Step 6: Final answer
    x = 1,778.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.