Home / 1,988.79-2,977.26-1,206.45

Finding the Fourth Proportional to 1,988.79, 2,977.26 and 1,206.45

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Solution

The fourth proportional to 1,988.79, 2,977.26 and 1,206.45 is: 1,806.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.79 : 2,977.26 = 1,206.45 : x
  2. Step 2: Convert to fraction form
    1,988.79/2,977.26 = 1,206.45/x
  3. Step 3: Cross multiply
    1,988.79x = 2,977.26 × 1,206.45
  4. Step 4: Simplify right side
    1,988.79x = 3,591,915.33
  5. Step 5: Solve for x
    x = 3,591,915.33/1,988.79
  6. Step 6: Final answer
    x = 1,806.08

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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.