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Finding the Fourth Proportional to 472.06, 704.90 and 385.56

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Solution

The fourth proportional to 472.06, 704.90 and 385.56 is: 575.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.06 : 704.90 = 385.56 : x
  2. Step 2: Convert to fraction form
    472.06/704.90 = 385.56/x
  3. Step 3: Cross multiply
    472.06x = 704.90 × 385.56
  4. Step 4: Simplify right side
    472.06x = 271,781.22
  5. Step 5: Solve for x
    x = 271,781.22/472.06
  6. Step 6: Final answer
    x = 575.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.