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Finding the Fourth Proportional to 553.02, 763.12 and 331.89

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Solution

The fourth proportional to 553.02, 763.12 and 331.89 is: 457.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.02 : 763.12 = 331.89 : x
  2. Step 2: Convert to fraction form
    553.02/763.12 = 331.89/x
  3. Step 3: Cross multiply
    553.02x = 763.12 × 331.89
  4. Step 4: Simplify right side
    553.02x = 253,271.90
  5. Step 5: Solve for x
    x = 253,271.90/553.02
  6. Step 6: Final answer
    x = 457.98

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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.