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Finding the Fourth Proportional to 641.02, 884.31 and 404.86

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Solution

The fourth proportional to 641.02, 884.31 and 404.86 is: 558.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.02 : 884.31 = 404.86 : x
  2. Step 2: Convert to fraction form
    641.02/884.31 = 404.86/x
  3. Step 3: Cross multiply
    641.02x = 884.31 × 404.86
  4. Step 4: Simplify right side
    641.02x = 358,021.75
  5. Step 5: Solve for x
    x = 358,021.75/641.02
  6. Step 6: Final answer
    x = 558.52

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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.