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Finding the Fourth Proportional to 648.92, 975.82 and 551.72

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Solution

The fourth proportional to 648.92, 975.82 and 551.72 is: 829.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.92 : 975.82 = 551.72 : x
  2. Step 2: Convert to fraction form
    648.92/975.82 = 551.72/x
  3. Step 3: Cross multiply
    648.92x = 975.82 × 551.72
  4. Step 4: Simplify right side
    648.92x = 538,379.41
  5. Step 5: Solve for x
    x = 538,379.41/648.92
  6. Step 6: Final answer
    x = 829.65

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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.