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Finding the Fourth Proportional to 2,988.99, 4,107.50 and 2,851.79

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Solution

The fourth proportional to 2,988.99, 4,107.50 and 2,851.79 is: 3,918.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.99 : 4,107.50 = 2,851.79 : x
  2. Step 2: Convert to fraction form
    2,988.99/4,107.50 = 2,851.79/x
  3. Step 3: Cross multiply
    2,988.99x = 4,107.50 × 2,851.79
  4. Step 4: Simplify right side
    2,988.99x = 11,713,730.99
  5. Step 5: Solve for x
    x = 11,713,730.99/2,988.99
  6. Step 6: Final answer
    x = 3,918.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.