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Finding the Fourth Proportional to 1,215.41, 1,822.02 and 1,031.48

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Solution

The fourth proportional to 1,215.41, 1,822.02 and 1,031.48 is: 1,546.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.41 : 1,822.02 = 1,031.48 : x
  2. Step 2: Convert to fraction form
    1,215.41/1,822.02 = 1,031.48/x
  3. Step 3: Cross multiply
    1,215.41x = 1,822.02 × 1,031.48
  4. Step 4: Simplify right side
    1,215.41x = 1,879,368.08
  5. Step 5: Solve for x
    x = 1,879,368.08/1,215.41
  6. Step 6: Final answer
    x = 1,546.29

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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.