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Finding the Fourth Proportional to 1,639.08, 2,458.98 and 994.02

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Solution

The fourth proportional to 1,639.08, 2,458.98 and 994.02 is: 1,491.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.08 : 2,458.98 = 994.02 : x
  2. Step 2: Convert to fraction form
    1,639.08/2,458.98 = 994.02/x
  3. Step 3: Cross multiply
    1,639.08x = 2,458.98 × 994.02
  4. Step 4: Simplify right side
    1,639.08x = 2,444,275.30
  5. Step 5: Solve for x
    x = 2,444,275.30/1,639.08
  6. Step 6: Final answer
    x = 1,491.25

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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.