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Finding the Fourth Proportional to 436.99, 655.83 and 385.74

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Solution

The fourth proportional to 436.99, 655.83 and 385.74 is: 578.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.99 : 655.83 = 385.74 : x
  2. Step 2: Convert to fraction form
    436.99/655.83 = 385.74/x
  3. Step 3: Cross multiply
    436.99x = 655.83 × 385.74
  4. Step 4: Simplify right side
    436.99x = 252,979.86
  5. Step 5: Solve for x
    x = 252,979.86/436.99
  6. Step 6: Final answer
    x = 578.91

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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.