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Finding the Fourth Proportional to 670.56, 923.82 and 553.92

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Solution

The fourth proportional to 670.56, 923.82 and 553.92 is: 763.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.56 : 923.82 = 553.92 : x
  2. Step 2: Convert to fraction form
    670.56/923.82 = 553.92/x
  3. Step 3: Cross multiply
    670.56x = 923.82 × 553.92
  4. Step 4: Simplify right side
    670.56x = 511,722.37
  5. Step 5: Solve for x
    x = 511,722.37/670.56
  6. Step 6: Final answer
    x = 763.13

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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.