Home / 2,141.19-3,212.87-987.75

Finding the Fourth Proportional to 2,141.19, 3,212.87 and 987.75

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Solution

The fourth proportional to 2,141.19, 3,212.87 and 987.75 is: 1,482.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.19 : 3,212.87 = 987.75 : x
  2. Step 2: Convert to fraction form
    2,141.19/3,212.87 = 987.75/x
  3. Step 3: Cross multiply
    2,141.19x = 3,212.87 × 987.75
  4. Step 4: Simplify right side
    2,141.19x = 3,173,507.40
  5. Step 5: Solve for x
    x = 3,173,507.40/2,141.19
  6. Step 6: Final answer
    x = 1,482.12

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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.