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Finding the Fourth Proportional to 1,216.01, 1,815.16 and 1,125.74

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Solution

The fourth proportional to 1,216.01, 1,815.16 and 1,125.74 is: 1,680.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.01 : 1,815.16 = 1,125.74 : x
  2. Step 2: Convert to fraction form
    1,216.01/1,815.16 = 1,125.74/x
  3. Step 3: Cross multiply
    1,216.01x = 1,815.16 × 1,125.74
  4. Step 4: Simplify right side
    1,216.01x = 2,043,398.22
  5. Step 5: Solve for x
    x = 2,043,398.22/1,216.01
  6. Step 6: Final answer
    x = 1,680.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.