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Finding the Fourth Proportional to 3,325.11, 4,988.70 and 985.11

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Solution

The fourth proportional to 3,325.11, 4,988.70 and 985.11 is: 1,477.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,325.11 : 4,988.70 = 985.11 : x
  2. Step 2: Convert to fraction form
    3,325.11/4,988.70 = 985.11/x
  3. Step 3: Cross multiply
    3,325.11x = 4,988.70 × 985.11
  4. Step 4: Simplify right side
    3,325.11x = 4,914,418.26
  5. Step 5: Solve for x
    x = 4,914,418.26/3,325.11
  6. Step 6: Final answer
    x = 1,477.97

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Double scale
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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.