Home / 2,089.60-3,125.40-1,871.80

Finding the Fourth Proportional to 2,089.60, 3,125.40 and 1,871.80

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Solution

The fourth proportional to 2,089.60, 3,125.40 and 1,871.80 is: 2,799.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.60 : 3,125.40 = 1,871.80 : x
  2. Step 2: Convert to fraction form
    2,089.60/3,125.40 = 1,871.80/x
  3. Step 3: Cross multiply
    2,089.60x = 3,125.40 × 1,871.80
  4. Step 4: Simplify right side
    2,089.60x = 5,850,123.72
  5. Step 5: Solve for x
    x = 5,850,123.72/2,089.60
  6. Step 6: Final answer
    x = 2,799.64

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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.