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Finding the Fourth Proportional to 5,906.80, 8,860.20 and 5,291.20

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Solution

The fourth proportional to 5,906.80, 8,860.20 and 5,291.20 is: 7,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,906.80 : 8,860.20 = 5,291.20 : x
  2. Step 2: Convert to fraction form
    5,906.80/8,860.20 = 5,291.20/x
  3. Step 3: Cross multiply
    5,906.80x = 8,860.20 × 5,291.20
  4. Step 4: Simplify right side
    5,906.80x = 46,881,090.24
  5. Step 5: Solve for x
    x = 46,881,090.24/5,906.80
  6. Step 6: Final answer
    x = 7,936.80

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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.