Home / 1,989.16-2,979.64-1,164.93

Finding the Fourth Proportional to 1,989.16, 2,979.64 and 1,164.93

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Solution

The fourth proportional to 1,989.16, 2,979.64 and 1,164.93 is: 1,745.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.16 : 2,979.64 = 1,164.93 : x
  2. Step 2: Convert to fraction form
    1,989.16/2,979.64 = 1,164.93/x
  3. Step 3: Cross multiply
    1,989.16x = 2,979.64 × 1,164.93
  4. Step 4: Simplify right side
    1,989.16x = 3,471,072.52
  5. Step 5: Solve for x
    x = 3,471,072.52/1,989.16
  6. Step 6: Final answer
    x = 1,745.00

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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.