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Finding the Fourth Proportional to 604.92, 906.75 and 385.70

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Solution

The fourth proportional to 604.92, 906.75 and 385.70 is: 578.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.92 : 906.75 = 385.70 : x
  2. Step 2: Convert to fraction form
    604.92/906.75 = 385.70/x
  3. Step 3: Cross multiply
    604.92x = 906.75 × 385.70
  4. Step 4: Simplify right side
    604.92x = 349,728.94
  5. Step 5: Solve for x
    x = 349,728.94/604.92
  6. Step 6: Final answer
    x = 578.14

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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.