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Finding the Fourth Proportional to 3,298.13, 4,947.19 and 989.63

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Solution

The fourth proportional to 3,298.13, 4,947.19 and 989.63 is: 1,484.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,298.13 : 4,947.19 = 989.63 : x
  2. Step 2: Convert to fraction form
    3,298.13/4,947.19 = 989.63/x
  3. Step 3: Cross multiply
    3,298.13x = 4,947.19 × 989.63
  4. Step 4: Simplify right side
    3,298.13x = 4,895,860.43
  5. Step 5: Solve for x
    x = 4,895,860.43/3,298.13
  6. Step 6: Final answer
    x = 1,484.44

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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.