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Finding the Fourth Proportional to 641.48, 884.94 and 554

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Solution

The fourth proportional to 641.48, 884.94 and 554 is: 764.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.48 : 884.94 = 554 : x
  2. Step 2: Convert to fraction form
    641.48/884.94 = 554/x
  3. Step 3: Cross multiply
    641.48x = 884.94 × 554
  4. Step 4: Simplify right side
    641.48x = 490,256.76
  5. Step 5: Solve for x
    x = 490,256.76/641.48
  6. Step 6: Final answer
    x = 764.26

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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.