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Finding the Fourth Proportional to 358.66, 495.12 and 280.09

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Solution

The fourth proportional to 358.66, 495.12 and 280.09 is: 386.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.66 : 495.12 = 280.09 : x
  2. Step 2: Convert to fraction form
    358.66/495.12 = 280.09/x
  3. Step 3: Cross multiply
    358.66x = 495.12 × 280.09
  4. Step 4: Simplify right side
    358.66x = 138,678.16
  5. Step 5: Solve for x
    x = 138,678.16/358.66
  6. Step 6: Final answer
    x = 386.66

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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.