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Finding the Fourth Proportional to 359.38, 495.66 and 228.40

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Solution

The fourth proportional to 359.38, 495.66 and 228.40 is: 315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.38 : 495.66 = 228.40 : x
  2. Step 2: Convert to fraction form
    359.38/495.66 = 228.40/x
  3. Step 3: Cross multiply
    359.38x = 495.66 × 228.40
  4. Step 4: Simplify right side
    359.38x = 113,208.74
  5. Step 5: Solve for x
    x = 113,208.74/359.38
  6. Step 6: Final answer
    x = 315.01

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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.