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Finding the Fourth Proportional to 436.75, 655.14 and 148.21

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Solution

The fourth proportional to 436.75, 655.14 and 148.21 is: 222.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.75 : 655.14 = 148.21 : x
  2. Step 2: Convert to fraction form
    436.75/655.14 = 148.21/x
  3. Step 3: Cross multiply
    436.75x = 655.14 × 148.21
  4. Step 4: Simplify right side
    436.75x = 97,098.30
  5. Step 5: Solve for x
    x = 97,098.30/436.75
  6. Step 6: Final answer
    x = 222.32

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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.