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Finding the Fourth Proportional to 2,936.70, 4,404.78 and 988.74

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Solution

The fourth proportional to 2,936.70, 4,404.78 and 988.74 is: 1,483.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,936.70 : 4,404.78 = 988.74 : x
  2. Step 2: Convert to fraction form
    2,936.70/4,404.78 = 988.74/x
  3. Step 3: Cross multiply
    2,936.70x = 4,404.78 × 988.74
  4. Step 4: Simplify right side
    2,936.70x = 4,355,182.18
  5. Step 5: Solve for x
    x = 4,355,182.18/2,936.70
  6. Step 6: Final answer
    x = 1,483.02

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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.