Home / 1,217.40-1,825.80-351.78

Finding the Fourth Proportional to 1,217.40, 1,825.80 and 351.78

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Solution

The fourth proportional to 1,217.40, 1,825.80 and 351.78 is: 527.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.40 : 1,825.80 = 351.78 : x
  2. Step 2: Convert to fraction form
    1,217.40/1,825.80 = 351.78/x
  3. Step 3: Cross multiply
    1,217.40x = 1,825.80 × 351.78
  4. Step 4: Simplify right side
    1,217.40x = 642,279.92
  5. Step 5: Solve for x
    x = 642,279.92/1,217.40
  6. Step 6: Final answer
    x = 527.58

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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.