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Finding the Fourth Proportional to 603.78, 906.45 and 330.06

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Solution

The fourth proportional to 603.78, 906.45 and 330.06 is: 495.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.78 : 906.45 = 330.06 : x
  2. Step 2: Convert to fraction form
    603.78/906.45 = 330.06/x
  3. Step 3: Cross multiply
    603.78x = 906.45 × 330.06
  4. Step 4: Simplify right side
    603.78x = 299,182.89
  5. Step 5: Solve for x
    x = 299,182.89/603.78
  6. Step 6: Final answer
    x = 495.52

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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.