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Finding the Fourth Proportional to 553.60, 763.77 and 357.09

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Solution

The fourth proportional to 553.60, 763.77 and 357.09 is: 492.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.60 : 763.77 = 357.09 : x
  2. Step 2: Convert to fraction form
    553.60/763.77 = 357.09/x
  3. Step 3: Cross multiply
    553.60x = 763.77 × 357.09
  4. Step 4: Simplify right side
    553.60x = 272,734.63
  5. Step 5: Solve for x
    x = 272,734.63/553.60
  6. Step 6: Final answer
    x = 492.66

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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.