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Finding the Fourth Proportional to 6,287.40, 9,431.10 and 6,190.20

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Solution

The fourth proportional to 6,287.40, 9,431.10 and 6,190.20 is: 9,285.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,287.40 : 9,431.10 = 6,190.20 : x
  2. Step 2: Convert to fraction form
    6,287.40/9,431.10 = 6,190.20/x
  3. Step 3: Cross multiply
    6,287.40x = 9,431.10 × 6,190.20
  4. Step 4: Simplify right side
    6,287.40x = 58,380,395.22
  5. Step 5: Solve for x
    x = 58,380,395.22/6,287.40
  6. Step 6: Final answer
    x = 9,285.30

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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.