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Finding the Fourth Proportional to 646.72, 892.56 and 548.08

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Solution

The fourth proportional to 646.72, 892.56 and 548.08 is: 756.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.72 : 892.56 = 548.08 : x
  2. Step 2: Convert to fraction form
    646.72/892.56 = 548.08/x
  3. Step 3: Cross multiply
    646.72x = 892.56 × 548.08
  4. Step 4: Simplify right side
    646.72x = 489,194.28
  5. Step 5: Solve for x
    x = 489,194.28/646.72
  6. Step 6: Final answer
    x = 756.42

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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.