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Finding the Fourth Proportional to 417.33, 572.46 and 393.69

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Solution

The fourth proportional to 417.33, 572.46 and 393.69 is: 540.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.33 : 572.46 = 393.69 : x
  2. Step 2: Convert to fraction form
    417.33/572.46 = 393.69/x
  3. Step 3: Cross multiply
    417.33x = 572.46 × 393.69
  4. Step 4: Simplify right side
    417.33x = 225,371.78
  5. Step 5: Solve for x
    x = 225,371.78/417.33
  6. Step 6: Final answer
    x = 540.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.