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Finding the Fourth Proportional to 1,992.75, 2,989.86 and 624.75

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Solution

The fourth proportional to 1,992.75, 2,989.86 and 624.75 is: 937.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.75 : 2,989.86 = 624.75 : x
  2. Step 2: Convert to fraction form
    1,992.75/2,989.86 = 624.75/x
  3. Step 3: Cross multiply
    1,992.75x = 2,989.86 × 624.75
  4. Step 4: Simplify right side
    1,992.75x = 1,867,915.04
  5. Step 5: Solve for x
    x = 1,867,915.04/1,992.75
  6. Step 6: Final answer
    x = 937.36

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1.5x scale

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.