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Finding the Fourth Proportional to 553.43, 763.80 and 357.51

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Solution

The fourth proportional to 553.43, 763.80 and 357.51 is: 493.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.43 : 763.80 = 357.51 : x
  2. Step 2: Convert to fraction form
    553.43/763.80 = 357.51/x
  3. Step 3: Cross multiply
    553.43x = 763.80 × 357.51
  4. Step 4: Simplify right side
    553.43x = 273,066.14
  5. Step 5: Solve for x
    x = 273,066.14/553.43
  6. Step 6: Final answer
    x = 493.41

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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.