Home / 2,315.14-3,474.09-928.78

Finding the Fourth Proportional to 2,315.14, 3,474.09 and 928.78

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Solution

The fourth proportional to 2,315.14, 3,474.09 and 928.78 is: 1,393.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.14 : 3,474.09 = 928.78 : x
  2. Step 2: Convert to fraction form
    2,315.14/3,474.09 = 928.78/x
  3. Step 3: Cross multiply
    2,315.14x = 3,474.09 × 928.78
  4. Step 4: Simplify right side
    2,315.14x = 3,226,665.31
  5. Step 5: Solve for x
    x = 3,226,665.31/2,315.14
  6. Step 6: Final answer
    x = 1,393.72

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1.5x scale

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.