Home / 4,212.88-6,319.32-1,291.15

Finding the Fourth Proportional to 4,212.88, 6,319.32 and 1,291.15

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Solution

The fourth proportional to 4,212.88, 6,319.32 and 1,291.15 is: 1,936.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,212.88 : 6,319.32 = 1,291.15 : x
  2. Step 2: Convert to fraction form
    4,212.88/6,319.32 = 1,291.15/x
  3. Step 3: Cross multiply
    4,212.88x = 6,319.32 × 1,291.15
  4. Step 4: Simplify right side
    4,212.88x = 8,159,190.02
  5. Step 5: Solve for x
    x = 8,159,190.02/4,212.88
  6. Step 6: Final answer
    x = 1,936.73

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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.