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Finding the Fourth Proportional to 862.22, 1,293.33 and 277.20

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Solution

The fourth proportional to 862.22, 1,293.33 and 277.20 is: 415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.22 : 1,293.33 = 277.20 : x
  2. Step 2: Convert to fraction form
    862.22/1,293.33 = 277.20/x
  3. Step 3: Cross multiply
    862.22x = 1,293.33 × 277.20
  4. Step 4: Simplify right side
    862.22x = 358,511.08
  5. Step 5: Solve for x
    x = 358,511.08/862.22
  6. Step 6: Final answer
    x = 415.80

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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.