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Finding the Fourth Proportional to 358.35, 495.87 and 305.81

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Solution

The fourth proportional to 358.35, 495.87 and 305.81 is: 423.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.35 : 495.87 = 305.81 : x
  2. Step 2: Convert to fraction form
    358.35/495.87 = 305.81/x
  3. Step 3: Cross multiply
    358.35x = 495.87 × 305.81
  4. Step 4: Simplify right side
    358.35x = 151,642.00
  5. Step 5: Solve for x
    x = 151,642.00/358.35
  6. Step 6: Final answer
    x = 423.17

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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.