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Finding the Fourth Proportional to 2,836.71, 4,253.91 and 987.44

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Solution

The fourth proportional to 2,836.71, 4,253.91 and 987.44 is: 1,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,836.71 : 4,253.91 = 987.44 : x
  2. Step 2: Convert to fraction form
    2,836.71/4,253.91 = 987.44/x
  3. Step 3: Cross multiply
    2,836.71x = 4,253.91 × 987.44
  4. Step 4: Simplify right side
    2,836.71x = 4,200,459.62
  5. Step 5: Solve for x
    x = 4,200,459.62/2,836.71
  6. Step 6: Final answer
    x = 1,480.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.