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Finding the Fourth Proportional to 397.96, 592.84 and 385.87

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Solution

The fourth proportional to 397.96, 592.84 and 385.87 is: 574.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.96 : 592.84 = 385.87 : x
  2. Step 2: Convert to fraction form
    397.96/592.84 = 385.87/x
  3. Step 3: Cross multiply
    397.96x = 592.84 × 385.87
  4. Step 4: Simplify right side
    397.96x = 228,756.98
  5. Step 5: Solve for x
    x = 228,756.98/397.96
  6. Step 6: Final answer
    x = 574.82

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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.