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Finding the Fourth Proportional to 443.28, 608.46 and 404.40

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Solution

The fourth proportional to 443.28, 608.46 and 404.40 is: 555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.28 : 608.46 = 404.40 : x
  2. Step 2: Convert to fraction form
    443.28/608.46 = 404.40/x
  3. Step 3: Cross multiply
    443.28x = 608.46 × 404.40
  4. Step 4: Simplify right side
    443.28x = 246,061.22
  5. Step 5: Solve for x
    x = 246,061.22/443.28
  6. Step 6: Final answer
    x = 555.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.