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Finding the Fourth Proportional to 1,860.90, 2,791.19 and 544.55

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Solution

The fourth proportional to 1,860.90, 2,791.19 and 544.55 is: 816.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.90 : 2,791.19 = 544.55 : x
  2. Step 2: Convert to fraction form
    1,860.90/2,791.19 = 544.55/x
  3. Step 3: Cross multiply
    1,860.90x = 2,791.19 × 544.55
  4. Step 4: Simplify right side
    1,860.90x = 1,519,929.92
  5. Step 5: Solve for x
    x = 1,519,929.92/1,860.90
  6. Step 6: Final answer
    x = 816.77

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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.