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Finding the Fourth Proportional to 2,624.30, 3,936.44 and 981.26

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Solution

The fourth proportional to 2,624.30, 3,936.44 and 981.26 is: 1,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,624.30 : 3,936.44 = 981.26 : x
  2. Step 2: Convert to fraction form
    2,624.30/3,936.44 = 981.26/x
  3. Step 3: Cross multiply
    2,624.30x = 3,936.44 × 981.26
  4. Step 4: Simplify right side
    2,624.30x = 3,862,671.11
  5. Step 5: Solve for x
    x = 3,862,671.11/2,624.30
  6. Step 6: Final answer
    x = 1,471.89

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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.