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Finding the Fourth Proportional to 676.81, 1,015.35 and 614.98

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Solution

The fourth proportional to 676.81, 1,015.35 and 614.98 is: 922.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.81 : 1,015.35 = 614.98 : x
  2. Step 2: Convert to fraction form
    676.81/1,015.35 = 614.98/x
  3. Step 3: Cross multiply
    676.81x = 1,015.35 × 614.98
  4. Step 4: Simplify right side
    676.81x = 624,419.94
  5. Step 5: Solve for x
    x = 624,419.94/676.81
  6. Step 6: Final answer
    x = 922.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.