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Finding the Fourth Proportional to 1,989.37, 2,982.07 and 999.16

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Solution

The fourth proportional to 1,989.37, 2,982.07 and 999.16 is: 1,497.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.37 : 2,982.07 = 999.16 : x
  2. Step 2: Convert to fraction form
    1,989.37/2,982.07 = 999.16/x
  3. Step 3: Cross multiply
    1,989.37x = 2,982.07 × 999.16
  4. Step 4: Simplify right side
    1,989.37x = 2,979,565.06
  5. Step 5: Solve for x
    x = 2,979,565.06/1,989.37
  6. Step 6: Final answer
    x = 1,497.74

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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.