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Finding the Fourth Proportional to 676.94, 1,020.19 and 612.02

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Solution

The fourth proportional to 676.94, 1,020.19 and 612.02 is: 922.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.94 : 1,020.19 = 612.02 : x
  2. Step 2: Convert to fraction form
    676.94/1,020.19 = 612.02/x
  3. Step 3: Cross multiply
    676.94x = 1,020.19 × 612.02
  4. Step 4: Simplify right side
    676.94x = 624,376.05
  5. Step 5: Solve for x
    x = 624,376.05/676.94
  6. Step 6: Final answer
    x = 922.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.