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Finding the Fourth Proportional to 472.54, 652.36 and 394.78

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Solution

The fourth proportional to 472.54, 652.36 and 394.78 is: 545.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.54 : 652.36 = 394.78 : x
  2. Step 2: Convert to fraction form
    472.54/652.36 = 394.78/x
  3. Step 3: Cross multiply
    472.54x = 652.36 × 394.78
  4. Step 4: Simplify right side
    472.54x = 257,538.68
  5. Step 5: Solve for x
    x = 257,538.68/472.54
  6. Step 6: Final answer
    x = 545.01

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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.