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Finding the Fourth Proportional to 5,460.40, 8,191.20 and 1,998.40

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Solution

The fourth proportional to 5,460.40, 8,191.20 and 1,998.40 is: 2,997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,460.40 : 8,191.20 = 1,998.40 : x
  2. Step 2: Convert to fraction form
    5,460.40/8,191.20 = 1,998.40/x
  3. Step 3: Cross multiply
    5,460.40x = 8,191.20 × 1,998.40
  4. Step 4: Simplify right side
    5,460.40x = 16,369,294.08
  5. Step 5: Solve for x
    x = 16,369,294.08/5,460.40
  6. Step 6: Final answer
    x = 2,997.82

Related Problems

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Half scale
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Double scale
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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.