Home / 3,278.40-4,918.47-1,429.66

Finding the Fourth Proportional to 3,278.40, 4,918.47 and 1,429.66

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Solution

The fourth proportional to 3,278.40, 4,918.47 and 1,429.66 is: 2,144.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.40 : 4,918.47 = 1,429.66 : x
  2. Step 2: Convert to fraction form
    3,278.40/4,918.47 = 1,429.66/x
  3. Step 3: Cross multiply
    3,278.40x = 4,918.47 × 1,429.66
  4. Step 4: Simplify right side
    3,278.40x = 7,031,739.82
  5. Step 5: Solve for x
    x = 7,031,739.82/3,278.40
  6. Step 6: Final answer
    x = 2,144.87

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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.