Home / 1,285.49-1,928.24-311.60

Finding the Fourth Proportional to 1,285.49, 1,928.24 and 311.60

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Solution

The fourth proportional to 1,285.49, 1,928.24 and 311.60 is: 467.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.49 : 1,928.24 = 311.60 : x
  2. Step 2: Convert to fraction form
    1,285.49/1,928.24 = 311.60/x
  3. Step 3: Cross multiply
    1,285.49x = 1,928.24 × 311.60
  4. Step 4: Simplify right side
    1,285.49x = 600,829.16
  5. Step 5: Solve for x
    x = 600,829.16/1,285.49
  6. Step 6: Final answer
    x = 467.39

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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.