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Finding the Fourth Proportional to 404.43, 602.61 and 387.32

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Solution

The fourth proportional to 404.43, 602.61 and 387.32 is: 577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.43 : 602.61 = 387.32 : x
  2. Step 2: Convert to fraction form
    404.43/602.61 = 387.32/x
  3. Step 3: Cross multiply
    404.43x = 602.61 × 387.32
  4. Step 4: Simplify right side
    404.43x = 233,398.44
  5. Step 5: Solve for x
    x = 233,398.44/404.43
  6. Step 6: Final answer
    x = 577.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.