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Finding the Fourth Proportional to 655.21, 983.90 and 400.33

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Solution

The fourth proportional to 655.21, 983.90 and 400.33 is: 601.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.21 : 983.90 = 400.33 : x
  2. Step 2: Convert to fraction form
    655.21/983.90 = 400.33/x
  3. Step 3: Cross multiply
    655.21x = 983.90 × 400.33
  4. Step 4: Simplify right side
    655.21x = 393,884.69
  5. Step 5: Solve for x
    x = 393,884.69/655.21
  6. Step 6: Final answer
    x = 601.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.