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Finding the Fourth Proportional to 649.40, 973.94 and 238.31

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Solution

The fourth proportional to 649.40, 973.94 and 238.31 is: 357.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.40 : 973.94 = 238.31 : x
  2. Step 2: Convert to fraction form
    649.40/973.94 = 238.31/x
  3. Step 3: Cross multiply
    649.40x = 973.94 × 238.31
  4. Step 4: Simplify right side
    649.40x = 232,098.57
  5. Step 5: Solve for x
    x = 232,098.57/649.40
  6. Step 6: Final answer
    x = 357.41

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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.