Home / 1,221.18-1,830.45-528.17

Finding the Fourth Proportional to 1,221.18, 1,830.45 and 528.17

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Solution

The fourth proportional to 1,221.18, 1,830.45 and 528.17 is: 791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.18 : 1,830.45 = 528.17 : x
  2. Step 2: Convert to fraction form
    1,221.18/1,830.45 = 528.17/x
  3. Step 3: Cross multiply
    1,221.18x = 1,830.45 × 528.17
  4. Step 4: Simplify right side
    1,221.18x = 966,788.78
  5. Step 5: Solve for x
    x = 966,788.78/1,221.18
  6. Step 6: Final answer
    x = 791.68

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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.