Home / 1,648.30-2,274.11-939.65

Finding the Fourth Proportional to 1,648.30, 2,274.11 and 939.65

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Solution

The fourth proportional to 1,648.30, 2,274.11 and 939.65 is: 1,296.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648.30 : 2,274.11 = 939.65 : x
  2. Step 2: Convert to fraction form
    1,648.30/2,274.11 = 939.65/x
  3. Step 3: Cross multiply
    1,648.30x = 2,274.11 × 939.65
  4. Step 4: Simplify right side
    1,648.30x = 2,136,867.46
  5. Step 5: Solve for x
    x = 2,136,867.46/1,648.30
  6. Step 6: Final answer
    x = 1,296.41

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Double scale
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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.