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Finding the Fourth Proportional to 3,921.35, 5,882.18 and 999.68

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Solution

The fourth proportional to 3,921.35, 5,882.18 and 999.68 is: 1,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.35 : 5,882.18 = 999.68 : x
  2. Step 2: Convert to fraction form
    3,921.35/5,882.18 = 999.68/x
  3. Step 3: Cross multiply
    3,921.35x = 5,882.18 × 999.68
  4. Step 4: Simplify right side
    3,921.35x = 5,880,263.29
  5. Step 5: Solve for x
    x = 5,880,263.29/3,921.35
  6. Step 6: Final answer
    x = 1,499.55

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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.