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Finding the Fourth Proportional to 445.82, 614.94 and 288.40

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Solution

The fourth proportional to 445.82, 614.94 and 288.40 is: 397.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.82 : 614.94 = 288.40 : x
  2. Step 2: Convert to fraction form
    445.82/614.94 = 288.40/x
  3. Step 3: Cross multiply
    445.82x = 614.94 × 288.40
  4. Step 4: Simplify right side
    445.82x = 177,348.70
  5. Step 5: Solve for x
    x = 177,348.70/445.82
  6. Step 6: Final answer
    x = 397.80

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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.