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Finding the Fourth Proportional to 553.04, 763.03 and 331.91

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Solution

The fourth proportional to 553.04, 763.03 and 331.91 is: 457.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.04 : 763.03 = 331.91 : x
  2. Step 2: Convert to fraction form
    553.04/763.03 = 331.91/x
  3. Step 3: Cross multiply
    553.04x = 763.03 × 331.91
  4. Step 4: Simplify right side
    553.04x = 253,255.63
  5. Step 5: Solve for x
    x = 253,255.63/553.04
  6. Step 6: Final answer
    x = 457.93

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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.