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Finding the Fourth Proportional to 1,629.88, 2,249.06 and 931.24

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Solution

The fourth proportional to 1,629.88, 2,249.06 and 931.24 is: 1,285.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.88 : 2,249.06 = 931.24 : x
  2. Step 2: Convert to fraction form
    1,629.88/2,249.06 = 931.24/x
  3. Step 3: Cross multiply
    1,629.88x = 2,249.06 × 931.24
  4. Step 4: Simplify right side
    1,629.88x = 2,094,414.63
  5. Step 5: Solve for x
    x = 2,094,414.63/1,629.88
  6. Step 6: Final answer
    x = 1,285.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.