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Finding the Fourth Proportional to 1,629.62, 2,249.08 and 931.14

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Solution

The fourth proportional to 1,629.62, 2,249.08 and 931.14 is: 1,285.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.62 : 2,249.08 = 931.14 : x
  2. Step 2: Convert to fraction form
    1,629.62/2,249.08 = 931.14/x
  3. Step 3: Cross multiply
    1,629.62x = 2,249.08 × 931.14
  4. Step 4: Simplify right side
    1,629.62x = 2,094,208.35
  5. Step 5: Solve for x
    x = 2,094,208.35/1,629.62
  6. Step 6: Final answer
    x = 1,285.09

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1.5x scale

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.