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Finding the Fourth Proportional to 459.57, 633.11 and 385.86

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Solution

The fourth proportional to 459.57, 633.11 and 385.86 is: 531.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.57 : 633.11 = 385.86 : x
  2. Step 2: Convert to fraction form
    459.57/633.11 = 385.86/x
  3. Step 3: Cross multiply
    459.57x = 633.11 × 385.86
  4. Step 4: Simplify right side
    459.57x = 244,289.90
  5. Step 5: Solve for x
    x = 244,289.90/459.57
  6. Step 6: Final answer
    x = 531.56

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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.