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Finding the Fourth Proportional to 5,461.60, 8,190.60 and 1,998.40

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Solution

The fourth proportional to 5,461.60, 8,190.60 and 1,998.40 is: 2,996.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,461.60 : 8,190.60 = 1,998.40 : x
  2. Step 2: Convert to fraction form
    5,461.60/8,190.60 = 1,998.40/x
  3. Step 3: Cross multiply
    5,461.60x = 8,190.60 × 1,998.40
  4. Step 4: Simplify right side
    5,461.60x = 16,368,095.04
  5. Step 5: Solve for x
    x = 16,368,095.04/5,461.60
  6. Step 6: Final answer
    x = 2,996.94

Related Problems

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Half scale
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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.