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Finding the Fourth Proportional to 482.70, 666.42 and 305.89

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Solution

The fourth proportional to 482.70, 666.42 and 305.89 is: 422.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.70 : 666.42 = 305.89 : x
  2. Step 2: Convert to fraction form
    482.70/666.42 = 305.89/x
  3. Step 3: Cross multiply
    482.70x = 666.42 × 305.89
  4. Step 4: Simplify right side
    482.70x = 203,851.21
  5. Step 5: Solve for x
    x = 203,851.21/482.70
  6. Step 6: Final answer
    x = 422.31

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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.