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Finding the Fourth Proportional to 6,451.20, 8,899.20 and 5,241.60

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Solution

The fourth proportional to 6,451.20, 8,899.20 and 5,241.60 is: 7,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,451.20 : 8,899.20 = 5,241.60 : x
  2. Step 2: Convert to fraction form
    6,451.20/8,899.20 = 5,241.60/x
  3. Step 3: Cross multiply
    6,451.20x = 8,899.20 × 5,241.60
  4. Step 4: Simplify right side
    6,451.20x = 46,646,046.72
  5. Step 5: Solve for x
    x = 46,646,046.72/6,451.20
  6. Step 6: Final answer
    x = 7,230.60

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.