Home / 2,160.13-3,240.18-928.40

Finding the Fourth Proportional to 2,160.13, 3,240.18 and 928.40

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Solution

The fourth proportional to 2,160.13, 3,240.18 and 928.40 is: 1,392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.13 : 3,240.18 = 928.40 : x
  2. Step 2: Convert to fraction form
    2,160.13/3,240.18 = 928.40/x
  3. Step 3: Cross multiply
    2,160.13x = 3,240.18 × 928.40
  4. Step 4: Simplify right side
    2,160.13x = 3,008,183.11
  5. Step 5: Solve for x
    x = 3,008,183.11/2,160.13
  6. Step 6: Final answer
    x = 1,392.59

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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.