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Finding the Fourth Proportional to 412.78, 569.28 and 302.23

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Solution

The fourth proportional to 412.78, 569.28 and 302.23 is: 416.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.78 : 569.28 = 302.23 : x
  2. Step 2: Convert to fraction form
    412.78/569.28 = 302.23/x
  3. Step 3: Cross multiply
    412.78x = 569.28 × 302.23
  4. Step 4: Simplify right side
    412.78x = 172,053.49
  5. Step 5: Solve for x
    x = 172,053.49/412.78
  6. Step 6: Final answer
    x = 416.82

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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.