Home / 1,285.27-1,927.88-311.36

Finding the Fourth Proportional to 1,285.27, 1,927.88 and 311.36

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Solution

The fourth proportional to 1,285.27, 1,927.88 and 311.36 is: 467.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.27 : 1,927.88 = 311.36 : x
  2. Step 2: Convert to fraction form
    1,285.27/1,927.88 = 311.36/x
  3. Step 3: Cross multiply
    1,285.27x = 1,927.88 × 311.36
  4. Step 4: Simplify right side
    1,285.27x = 600,264.72
  5. Step 5: Solve for x
    x = 600,264.72/1,285.27
  6. Step 6: Final answer
    x = 467.03

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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.