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Finding the Fourth Proportional to 1,918.23, 2,873.58 and 994.39

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Solution

The fourth proportional to 1,918.23, 2,873.58 and 994.39 is: 1,489.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.23 : 2,873.58 = 994.39 : x
  2. Step 2: Convert to fraction form
    1,918.23/2,873.58 = 994.39/x
  3. Step 3: Cross multiply
    1,918.23x = 2,873.58 × 994.39
  4. Step 4: Simplify right side
    1,918.23x = 2,857,472.86
  5. Step 5: Solve for x
    x = 2,857,472.86/1,918.23
  6. Step 6: Final answer
    x = 1,489.64

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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.