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Finding the Fourth Proportional to 648.23, 970.61 and 517.34

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Solution

The fourth proportional to 648.23, 970.61 and 517.34 is: 774.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.23 : 970.61 = 517.34 : x
  2. Step 2: Convert to fraction form
    648.23/970.61 = 517.34/x
  3. Step 3: Cross multiply
    648.23x = 970.61 × 517.34
  4. Step 4: Simplify right side
    648.23x = 502,135.22
  5. Step 5: Solve for x
    x = 502,135.22/648.23
  6. Step 6: Final answer
    x = 774.63

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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.