Home / 1,285.18-1,927.77-311.29

Finding the Fourth Proportional to 1,285.18, 1,927.77 and 311.29

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Solution

The fourth proportional to 1,285.18, 1,927.77 and 311.29 is: 466.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.18 : 1,927.77 = 311.29 : x
  2. Step 2: Convert to fraction form
    1,285.18/1,927.77 = 311.29/x
  3. Step 3: Cross multiply
    1,285.18x = 1,927.77 × 311.29
  4. Step 4: Simplify right side
    1,285.18x = 600,089.54
  5. Step 5: Solve for x
    x = 600,089.54/1,285.18
  6. Step 6: Final answer
    x = 466.93

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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.