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Finding the Fourth Proportional to 553.08, 763.38 and 356.79

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Solution

The fourth proportional to 553.08, 763.38 and 356.79 is: 492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.08 : 763.38 = 356.79 : x
  2. Step 2: Convert to fraction form
    553.08/763.38 = 356.79/x
  3. Step 3: Cross multiply
    553.08x = 763.38 × 356.79
  4. Step 4: Simplify right side
    553.08x = 272,366.35
  5. Step 5: Solve for x
    x = 272,366.35/553.08
  6. Step 6: Final answer
    x = 492.45

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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.