Home / 4,278.69-6,419.52-1,781.21

Finding the Fourth Proportional to 4,278.69, 6,419.52 and 1,781.21

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Solution

The fourth proportional to 4,278.69, 6,419.52 and 1,781.21 is: 2,672.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,278.69 : 6,419.52 = 1,781.21 : x
  2. Step 2: Convert to fraction form
    4,278.69/6,419.52 = 1,781.21/x
  3. Step 3: Cross multiply
    4,278.69x = 6,419.52 × 1,781.21
  4. Step 4: Simplify right side
    4,278.69x = 11,434,529.27
  5. Step 5: Solve for x
    x = 11,434,529.27/4,278.69
  6. Step 6: Final answer
    x = 2,672.44

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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.