Home / 2,391.34-3,585.62-928.78

Finding the Fourth Proportional to 2,391.34, 3,585.62 and 928.78

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Solution

The fourth proportional to 2,391.34, 3,585.62 and 928.78 is: 1,392.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.34 : 3,585.62 = 928.78 : x
  2. Step 2: Convert to fraction form
    2,391.34/3,585.62 = 928.78/x
  3. Step 3: Cross multiply
    2,391.34x = 3,585.62 × 928.78
  4. Step 4: Simplify right side
    2,391.34x = 3,330,252.14
  5. Step 5: Solve for x
    x = 3,330,252.14/2,391.34
  6. Step 6: Final answer
    x = 1,392.63

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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.