Home / 2,808.68-4,207.55-1,420.34

Finding the Fourth Proportional to 2,808.68, 4,207.55 and 1,420.34

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Solution

The fourth proportional to 2,808.68, 4,207.55 and 1,420.34 is: 2,127.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.68 : 4,207.55 = 1,420.34 : x
  2. Step 2: Convert to fraction form
    2,808.68/4,207.55 = 1,420.34/x
  3. Step 3: Cross multiply
    2,808.68x = 4,207.55 × 1,420.34
  4. Step 4: Simplify right side
    2,808.68x = 5,976,123.43
  5. Step 5: Solve for x
    x = 5,976,123.43/2,808.68
  6. Step 6: Final answer
    x = 2,127.74

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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.