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Finding the Fourth Proportional to 552.79, 762.71 and 356.06

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Solution

The fourth proportional to 552.79, 762.71 and 356.06 is: 491.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.79 : 762.71 = 356.06 : x
  2. Step 2: Convert to fraction form
    552.79/762.71 = 356.06/x
  3. Step 3: Cross multiply
    552.79x = 762.71 × 356.06
  4. Step 4: Simplify right side
    552.79x = 271,571.98
  5. Step 5: Solve for x
    x = 271,571.98/552.79
  6. Step 6: Final answer
    x = 491.28

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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.