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Finding the Fourth Proportional to 475.02, 655.14 and 309.30

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Solution

The fourth proportional to 475.02, 655.14 and 309.30 is: 426.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.02 : 655.14 = 309.30 : x
  2. Step 2: Convert to fraction form
    475.02/655.14 = 309.30/x
  3. Step 3: Cross multiply
    475.02x = 655.14 × 309.30
  4. Step 4: Simplify right side
    475.02x = 202,634.80
  5. Step 5: Solve for x
    x = 202,634.80/475.02
  6. Step 6: Final answer
    x = 426.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.