Home / 2,656.28-3,981.40-1,355

Finding the Fourth Proportional to 2,656.28, 3,981.40 and 1,355

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Solution

The fourth proportional to 2,656.28, 3,981.40 and 1,355 is: 2,030.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656.28 : 3,981.40 = 1,355 : x
  2. Step 2: Convert to fraction form
    2,656.28/3,981.40 = 1,355/x
  3. Step 3: Cross multiply
    2,656.28x = 3,981.40 × 1,355
  4. Step 4: Simplify right side
    2,656.28x = 5,394,797
  5. Step 5: Solve for x
    x = 5,394,797/2,656.28
  6. Step 6: Final answer
    x = 2,030.96

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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.