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Finding the Fourth Proportional to 6,205.61, 9,310.34 and 1,989.49

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Solution

The fourth proportional to 6,205.61, 9,310.34 and 1,989.49 is: 2,984.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,205.61 : 9,310.34 = 1,989.49 : x
  2. Step 2: Convert to fraction form
    6,205.61/9,310.34 = 1,989.49/x
  3. Step 3: Cross multiply
    6,205.61x = 9,310.34 × 1,989.49
  4. Step 4: Simplify right side
    6,205.61x = 18,522,818.38
  5. Step 5: Solve for x
    x = 18,522,818.38/6,205.61
  6. Step 6: Final answer
    x = 2,984.85

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Double scale
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Similar ratio
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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.