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Finding the Fourth Proportional to 553.35, 763.49 and 356.63

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Solution

The fourth proportional to 553.35, 763.49 and 356.63 is: 492.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.35 : 763.49 = 356.63 : x
  2. Step 2: Convert to fraction form
    553.35/763.49 = 356.63/x
  3. Step 3: Cross multiply
    553.35x = 763.49 × 356.63
  4. Step 4: Simplify right side
    553.35x = 272,277.84
  5. Step 5: Solve for x
    x = 272,277.84/553.35
  6. Step 6: Final answer
    x = 492.05

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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.