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Finding the Fourth Proportional to 552.99, 763.31 and 356.51

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Solution

The fourth proportional to 552.99, 763.31 and 356.51 is: 492.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.99 : 763.31 = 356.51 : x
  2. Step 2: Convert to fraction form
    552.99/763.31 = 356.51/x
  3. Step 3: Cross multiply
    552.99x = 763.31 × 356.51
  4. Step 4: Simplify right side
    552.99x = 272,122.05
  5. Step 5: Solve for x
    x = 272,122.05/552.99
  6. Step 6: Final answer
    x = 492.09

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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.