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Finding the Fourth Proportional to 389.87, 537.81 and 335.33

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Solution

The fourth proportional to 389.87, 537.81 and 335.33 is: 462.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.87 : 537.81 = 335.33 : x
  2. Step 2: Convert to fraction form
    389.87/537.81 = 335.33/x
  3. Step 3: Cross multiply
    389.87x = 537.81 × 335.33
  4. Step 4: Simplify right side
    389.87x = 180,343.83
  5. Step 5: Solve for x
    x = 180,343.83/389.87
  6. Step 6: Final answer
    x = 462.57

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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.