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Finding the Fourth Proportional to 445.72, 614.97 and 288.36

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Solution

The fourth proportional to 445.72, 614.97 and 288.36 is: 397.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.72 : 614.97 = 288.36 : x
  2. Step 2: Convert to fraction form
    445.72/614.97 = 288.36/x
  3. Step 3: Cross multiply
    445.72x = 614.97 × 288.36
  4. Step 4: Simplify right side
    445.72x = 177,332.75
  5. Step 5: Solve for x
    x = 177,332.75/445.72
  6. Step 6: Final answer
    x = 397.86

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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.