Home / 2,158.09-3,236.70-987.77

Finding the Fourth Proportional to 2,158.09, 3,236.70 and 987.77

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Solution

The fourth proportional to 2,158.09, 3,236.70 and 987.77 is: 1,481.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.09 : 3,236.70 = 987.77 : x
  2. Step 2: Convert to fraction form
    2,158.09/3,236.70 = 987.77/x
  3. Step 3: Cross multiply
    2,158.09x = 3,236.70 × 987.77
  4. Step 4: Simplify right side
    2,158.09x = 3,197,115.16
  5. Step 5: Solve for x
    x = 3,197,115.16/2,158.09
  6. Step 6: Final answer
    x = 1,481.46

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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.