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Finding the Fourth Proportional to 512.22, 706.76 and 302.38

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Solution

The fourth proportional to 512.22, 706.76 and 302.38 is: 417.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.22 : 706.76 = 302.38 : x
  2. Step 2: Convert to fraction form
    512.22/706.76 = 302.38/x
  3. Step 3: Cross multiply
    512.22x = 706.76 × 302.38
  4. Step 4: Simplify right side
    512.22x = 213,710.09
  5. Step 5: Solve for x
    x = 213,710.09/512.22
  6. Step 6: Final answer
    x = 417.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.