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Finding the Fourth Proportional to 604.72, 906.48 and 239.28

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Solution

The fourth proportional to 604.72, 906.48 and 239.28 is: 358.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.72 : 906.48 = 239.28 : x
  2. Step 2: Convert to fraction form
    604.72/906.48 = 239.28/x
  3. Step 3: Cross multiply
    604.72x = 906.48 × 239.28
  4. Step 4: Simplify right side
    604.72x = 216,902.53
  5. Step 5: Solve for x
    x = 216,902.53/604.72
  6. Step 6: Final answer
    x = 358.68

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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.