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Finding the Fourth Proportional to 649.98, 976.50 and 613.08

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Solution

The fourth proportional to 649.98, 976.50 and 613.08 is: 921.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.98 : 976.50 = 613.08 : x
  2. Step 2: Convert to fraction form
    649.98/976.50 = 613.08/x
  3. Step 3: Cross multiply
    649.98x = 976.50 × 613.08
  4. Step 4: Simplify right side
    649.98x = 598,672.62
  5. Step 5: Solve for x
    x = 598,672.62/649.98
  6. Step 6: Final answer
    x = 921.06

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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.