Home / 2,479.80-3,421.78-1,815.46

Finding the Fourth Proportional to 2,479.80, 3,421.78 and 1,815.46

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Solution

The fourth proportional to 2,479.80, 3,421.78 and 1,815.46 is: 2,505.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.80 : 3,421.78 = 1,815.46 : x
  2. Step 2: Convert to fraction form
    2,479.80/3,421.78 = 1,815.46/x
  3. Step 3: Cross multiply
    2,479.80x = 3,421.78 × 1,815.46
  4. Step 4: Simplify right side
    2,479.80x = 6,212,104.72
  5. Step 5: Solve for x
    x = 6,212,104.72/2,479.80
  6. Step 6: Final answer
    x = 2,505.08

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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.