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Finding the Fourth Proportional to 553.03, 763.17 and 356.66

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Solution

The fourth proportional to 553.03, 763.17 and 356.66 is: 492.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.03 : 763.17 = 356.66 : x
  2. Step 2: Convert to fraction form
    553.03/763.17 = 356.66/x
  3. Step 3: Cross multiply
    553.03x = 763.17 × 356.66
  4. Step 4: Simplify right side
    553.03x = 272,192.21
  5. Step 5: Solve for x
    x = 272,192.21/553.03
  6. Step 6: Final answer
    x = 492.18

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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.