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Finding the Fourth Proportional to 2,936.89, 4,405.83 and 988.63

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Solution

The fourth proportional to 2,936.89, 4,405.83 and 988.63 is: 1,483.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,936.89 : 4,405.83 = 988.63 : x
  2. Step 2: Convert to fraction form
    2,936.89/4,405.83 = 988.63/x
  3. Step 3: Cross multiply
    2,936.89x = 4,405.83 × 988.63
  4. Step 4: Simplify right side
    2,936.89x = 4,355,735.71
  5. Step 5: Solve for x
    x = 4,355,735.71/2,936.89
  6. Step 6: Final answer
    x = 1,483.11

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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.