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Finding the Fourth Proportional to 715.04, 1,072.73 and 221.43

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Solution

The fourth proportional to 715.04, 1,072.73 and 221.43 is: 332.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.04 : 1,072.73 = 221.43 : x
  2. Step 2: Convert to fraction form
    715.04/1,072.73 = 221.43/x
  3. Step 3: Cross multiply
    715.04x = 1,072.73 × 221.43
  4. Step 4: Simplify right side
    715.04x = 237,537.29
  5. Step 5: Solve for x
    x = 237,537.29/715.04
  6. Step 6: Final answer
    x = 332.20

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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.