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Finding the Fourth Proportional to 437.04, 655.43 and 128.83

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Solution

The fourth proportional to 437.04, 655.43 and 128.83 is: 193.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.04 : 655.43 = 128.83 : x
  2. Step 2: Convert to fraction form
    437.04/655.43 = 128.83/x
  3. Step 3: Cross multiply
    437.04x = 655.43 × 128.83
  4. Step 4: Simplify right side
    437.04x = 84,439.38
  5. Step 5: Solve for x
    x = 84,439.38/437.04
  6. Step 6: Final answer
    x = 193.21

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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.