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Finding the Fourth Proportional to 3,325.92, 4,988.31 and 985.87

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Solution

The fourth proportional to 3,325.92, 4,988.31 and 985.87 is: 1,478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,325.92 : 4,988.31 = 985.87 : x
  2. Step 2: Convert to fraction form
    3,325.92/4,988.31 = 985.87/x
  3. Step 3: Cross multiply
    3,325.92x = 4,988.31 × 985.87
  4. Step 4: Simplify right side
    3,325.92x = 4,917,825.18
  5. Step 5: Solve for x
    x = 4,917,825.18/3,325.92
  6. Step 6: Final answer
    x = 1,478.64

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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.