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Finding the Fourth Proportional to 409.42, 564.89 and 284.94

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Solution

The fourth proportional to 409.42, 564.89 and 284.94 is: 393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.42 : 564.89 = 284.94 : x
  2. Step 2: Convert to fraction form
    409.42/564.89 = 284.94/x
  3. Step 3: Cross multiply
    409.42x = 564.89 × 284.94
  4. Step 4: Simplify right side
    409.42x = 160,959.76
  5. Step 5: Solve for x
    x = 160,959.76/409.42
  6. Step 6: Final answer
    x = 393.14

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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.