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Finding the Fourth Proportional to 553.23, 763.56 and 356.81

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Solution

The fourth proportional to 553.23, 763.56 and 356.81 is: 492.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.23 : 763.56 = 356.81 : x
  2. Step 2: Convert to fraction form
    553.23/763.56 = 356.81/x
  3. Step 3: Cross multiply
    553.23x = 763.56 × 356.81
  4. Step 4: Simplify right side
    553.23x = 272,442.03
  5. Step 5: Solve for x
    x = 272,442.03/553.23
  6. Step 6: Final answer
    x = 492.46

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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.