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Finding the Fourth Proportional to 894.30, 1,339.57 and 620.92

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Solution

The fourth proportional to 894.30, 1,339.57 and 620.92 is: 930.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.30 : 1,339.57 = 620.92 : x
  2. Step 2: Convert to fraction form
    894.30/1,339.57 = 620.92/x
  3. Step 3: Cross multiply
    894.30x = 1,339.57 × 620.92
  4. Step 4: Simplify right side
    894.30x = 831,765.80
  5. Step 5: Solve for x
    x = 831,765.80/894.30
  6. Step 6: Final answer
    x = 930.07

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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.