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Finding the Fourth Proportional to 2,836.06, 4,254.78 and 987.22

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Solution

The fourth proportional to 2,836.06, 4,254.78 and 987.22 is: 1,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,836.06 : 4,254.78 = 987.22 : x
  2. Step 2: Convert to fraction form
    2,836.06/4,254.78 = 987.22/x
  3. Step 3: Cross multiply
    2,836.06x = 4,254.78 × 987.22
  4. Step 4: Simplify right side
    2,836.06x = 4,200,403.91
  5. Step 5: Solve for x
    x = 4,200,403.91/2,836.06
  6. Step 6: Final answer
    x = 1,481.07

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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.