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Finding the Fourth Proportional to 574.22, 860.72 and 266.28

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Solution

The fourth proportional to 574.22, 860.72 and 266.28 is: 399.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.22 : 860.72 = 266.28 : x
  2. Step 2: Convert to fraction form
    574.22/860.72 = 266.28/x
  3. Step 3: Cross multiply
    574.22x = 860.72 × 266.28
  4. Step 4: Simplify right side
    574.22x = 229,189.46
  5. Step 5: Solve for x
    x = 229,189.46/574.22
  6. Step 6: Final answer
    x = 399.13

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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.