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Finding the Fourth Proportional to 902.74, 1,351.22 and 612.58

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Solution

The fourth proportional to 902.74, 1,351.22 and 612.58 is: 916.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.74 : 1,351.22 = 612.58 : x
  2. Step 2: Convert to fraction form
    902.74/1,351.22 = 612.58/x
  3. Step 3: Cross multiply
    902.74x = 1,351.22 × 612.58
  4. Step 4: Simplify right side
    902.74x = 827,730.35
  5. Step 5: Solve for x
    x = 827,730.35/902.74
  6. Step 6: Final answer
    x = 916.91

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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.