Home / 1,986.90-2,984.94-1,248.81

Finding the Fourth Proportional to 1,986.90, 2,984.94 and 1,248.81

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Solution

The fourth proportional to 1,986.90, 2,984.94 and 1,248.81 is: 1,876.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.90 : 2,984.94 = 1,248.81 : x
  2. Step 2: Convert to fraction form
    1,986.90/2,984.94 = 1,248.81/x
  3. Step 3: Cross multiply
    1,986.90x = 2,984.94 × 1,248.81
  4. Step 4: Simplify right side
    1,986.90x = 3,727,622.92
  5. Step 5: Solve for x
    x = 3,727,622.92/1,986.90
  6. Step 6: Final answer
    x = 1,876.10

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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.