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Finding the Fourth Proportional to 495.02, 682.91 and 305.90

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Solution

The fourth proportional to 495.02, 682.91 and 305.90 is: 422.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.02 : 682.91 = 305.90 : x
  2. Step 2: Convert to fraction form
    495.02/682.91 = 305.90/x
  3. Step 3: Cross multiply
    495.02x = 682.91 × 305.90
  4. Step 4: Simplify right side
    495.02x = 208,902.17
  5. Step 5: Solve for x
    x = 208,902.17/495.02
  6. Step 6: Final answer
    x = 422.01

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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.