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Finding the Fourth Proportional to 2,799.40, 4,199.71 and 851.55

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Solution

The fourth proportional to 2,799.40, 4,199.71 and 851.55 is: 1,277.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,799.40 : 4,199.71 = 851.55 : x
  2. Step 2: Convert to fraction form
    2,799.40/4,199.71 = 851.55/x
  3. Step 3: Cross multiply
    2,799.40x = 4,199.71 × 851.55
  4. Step 4: Simplify right side
    2,799.40x = 3,576,283.40
  5. Step 5: Solve for x
    x = 3,576,283.40/2,799.40
  6. Step 6: Final answer
    x = 1,277.52

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1.5x scale

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.