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Finding the Fourth Proportional to 1,639.01, 2,262.04 and 940.38

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Solution

The fourth proportional to 1,639.01, 2,262.04 and 940.38 is: 1,297.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.01 : 2,262.04 = 940.38 : x
  2. Step 2: Convert to fraction form
    1,639.01/2,262.04 = 940.38/x
  3. Step 3: Cross multiply
    1,639.01x = 2,262.04 × 940.38
  4. Step 4: Simplify right side
    1,639.01x = 2,127,174.82
  5. Step 5: Solve for x
    x = 2,127,174.82/1,639.01
  6. Step 6: Final answer
    x = 1,297.85

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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.