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Finding the Fourth Proportional to 471.40, 648.99 and 371.63

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Solution

The fourth proportional to 471.40, 648.99 and 371.63 is: 511.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.40 : 648.99 = 371.63 : x
  2. Step 2: Convert to fraction form
    471.40/648.99 = 371.63/x
  3. Step 3: Cross multiply
    471.40x = 648.99 × 371.63
  4. Step 4: Simplify right side
    471.40x = 241,185.78
  5. Step 5: Solve for x
    x = 241,185.78/471.40
  6. Step 6: Final answer
    x = 511.64

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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.