Home / 1,225.21-1,836.68-445.03

Finding the Fourth Proportional to 1,225.21, 1,836.68 and 445.03

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Solution

The fourth proportional to 1,225.21, 1,836.68 and 445.03 is: 667.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.21 : 1,836.68 = 445.03 : x
  2. Step 2: Convert to fraction form
    1,225.21/1,836.68 = 445.03/x
  3. Step 3: Cross multiply
    1,225.21x = 1,836.68 × 445.03
  4. Step 4: Simplify right side
    1,225.21x = 817,377.70
  5. Step 5: Solve for x
    x = 817,377.70/1,225.21
  6. Step 6: Final answer
    x = 667.13

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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.