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Finding the Fourth Proportional to 386.72, 578.70 and 335.96

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Solution

The fourth proportional to 386.72, 578.70 and 335.96 is: 502.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.72 : 578.70 = 335.96 : x
  2. Step 2: Convert to fraction form
    386.72/578.70 = 335.96/x
  3. Step 3: Cross multiply
    386.72x = 578.70 × 335.96
  4. Step 4: Simplify right side
    386.72x = 194,420.05
  5. Step 5: Solve for x
    x = 194,420.05/386.72
  6. Step 6: Final answer
    x = 502.74

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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.