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Finding the Fourth Proportional to 711.21, 1,066.87 and 224.30

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Solution

The fourth proportional to 711.21, 1,066.87 and 224.30 is: 336.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.21 : 1,066.87 = 224.30 : x
  2. Step 2: Convert to fraction form
    711.21/1,066.87 = 224.30/x
  3. Step 3: Cross multiply
    711.21x = 1,066.87 × 224.30
  4. Step 4: Simplify right side
    711.21x = 239,301.89
  5. Step 5: Solve for x
    x = 239,301.89/711.21
  6. Step 6: Final answer
    x = 336.47

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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.