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Finding the Fourth Proportional to 404.94, 559.24 and 312.60

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Solution

The fourth proportional to 404.94, 559.24 and 312.60 is: 431.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.94 : 559.24 = 312.60 : x
  2. Step 2: Convert to fraction form
    404.94/559.24 = 312.60/x
  3. Step 3: Cross multiply
    404.94x = 559.24 × 312.60
  4. Step 4: Simplify right side
    404.94x = 174,818.42
  5. Step 5: Solve for x
    x = 174,818.42/404.94
  6. Step 6: Final answer
    x = 431.71

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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.