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Finding the Fourth Proportional to 2,869.84, 4,279.51 and 2,642.64

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Solution

The fourth proportional to 2,869.84, 4,279.51 and 2,642.64 is: 3,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.84 : 4,279.51 = 2,642.64 : x
  2. Step 2: Convert to fraction form
    2,869.84/4,279.51 = 2,642.64/x
  3. Step 3: Cross multiply
    2,869.84x = 4,279.51 × 2,642.64
  4. Step 4: Simplify right side
    2,869.84x = 11,309,169.70
  5. Step 5: Solve for x
    x = 11,309,169.70/2,869.84
  6. Step 6: Final answer
    x = 3,940.70

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1.5x scale

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.