Home / 2,209.10-3,307.14-1,988.78

Finding the Fourth Proportional to 2,209.10, 3,307.14 and 1,988.78

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Solution

The fourth proportional to 2,209.10, 3,307.14 and 1,988.78 is: 2,977.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.10 : 3,307.14 = 1,988.78 : x
  2. Step 2: Convert to fraction form
    2,209.10/3,307.14 = 1,988.78/x
  3. Step 3: Cross multiply
    2,209.10x = 3,307.14 × 1,988.78
  4. Step 4: Simplify right side
    2,209.10x = 6,577,173.89
  5. Step 5: Solve for x
    x = 6,577,173.89/2,209.10
  6. Step 6: Final answer
    x = 2,977.31

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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.