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Finding the Fourth Proportional to 495.45, 679.46 and 475.20

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Solution

The fourth proportional to 495.45, 679.46 and 475.20 is: 651.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.45 : 679.46 = 475.20 : x
  2. Step 2: Convert to fraction form
    495.45/679.46 = 475.20/x
  3. Step 3: Cross multiply
    495.45x = 679.46 × 475.20
  4. Step 4: Simplify right side
    495.45x = 322,877.02
  5. Step 5: Solve for x
    x = 322,877.02/495.45
  6. Step 6: Final answer
    x = 651.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.