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Finding the Fourth Proportional to 553.23, 761.40 and 452.79

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Solution

The fourth proportional to 553.23, 761.40 and 452.79 is: 623.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.23 : 761.40 = 452.79 : x
  2. Step 2: Convert to fraction form
    553.23/761.40 = 452.79/x
  3. Step 3: Cross multiply
    553.23x = 761.40 × 452.79
  4. Step 4: Simplify right side
    553.23x = 344,754.31
  5. Step 5: Solve for x
    x = 344,754.31/553.23
  6. Step 6: Final answer
    x = 623.17

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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.