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Finding the Fourth Proportional to 358.21, 495.21 and 342.91

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Solution

The fourth proportional to 358.21, 495.21 and 342.91 is: 474.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.21 : 495.21 = 342.91 : x
  2. Step 2: Convert to fraction form
    358.21/495.21 = 342.91/x
  3. Step 3: Cross multiply
    358.21x = 495.21 × 342.91
  4. Step 4: Simplify right side
    358.21x = 169,812.46
  5. Step 5: Solve for x
    x = 169,812.46/358.21
  6. Step 6: Final answer
    x = 474.06

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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.