Home / 1,042.08-1,563.39-311.66

Finding the Fourth Proportional to 1,042.08, 1,563.39 and 311.66

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Solution

The fourth proportional to 1,042.08, 1,563.39 and 311.66 is: 467.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.08 : 1,563.39 = 311.66 : x
  2. Step 2: Convert to fraction form
    1,042.08/1,563.39 = 311.66/x
  3. Step 3: Cross multiply
    1,042.08x = 1,563.39 × 311.66
  4. Step 4: Simplify right side
    1,042.08x = 487,236.75
  5. Step 5: Solve for x
    x = 487,236.75/1,042.08
  6. Step 6: Final answer
    x = 467.56

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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.