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Finding the Fourth Proportional to 679.56, 936.65 and 654.05

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Solution

The fourth proportional to 679.56, 936.65 and 654.05 is: 901.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.56 : 936.65 = 654.05 : x
  2. Step 2: Convert to fraction form
    679.56/936.65 = 654.05/x
  3. Step 3: Cross multiply
    679.56x = 936.65 × 654.05
  4. Step 4: Simplify right side
    679.56x = 612,607.98
  5. Step 5: Solve for x
    x = 612,607.98/679.56
  6. Step 6: Final answer
    x = 901.48

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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.