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Finding the Fourth Proportional to 2,875.80, 3,969.78 and 1,757.10

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Solution

The fourth proportional to 2,875.80, 3,969.78 and 1,757.10 is: 2,425.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.80 : 3,969.78 = 1,757.10 : x
  2. Step 2: Convert to fraction form
    2,875.80/3,969.78 = 1,757.10/x
  3. Step 3: Cross multiply
    2,875.80x = 3,969.78 × 1,757.10
  4. Step 4: Simplify right side
    2,875.80x = 6,975,300.44
  5. Step 5: Solve for x
    x = 6,975,300.44/2,875.80
  6. Step 6: Final answer
    x = 2,425.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.