Home / 1,224.12-1,836.28-391.30

Finding the Fourth Proportional to 1,224.12, 1,836.28 and 391.30

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Solution

The fourth proportional to 1,224.12, 1,836.28 and 391.30 is: 586.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.12 : 1,836.28 = 391.30 : x
  2. Step 2: Convert to fraction form
    1,224.12/1,836.28 = 391.30/x
  3. Step 3: Cross multiply
    1,224.12x = 1,836.28 × 391.30
  4. Step 4: Simplify right side
    1,224.12x = 718,536.36
  5. Step 5: Solve for x
    x = 718,536.36/1,224.12
  6. Step 6: Final answer
    x = 586.98

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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.