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Finding the Fourth Proportional to 1,813.39, 2,721.90 and 992.05

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Solution

The fourth proportional to 1,813.39, 2,721.90 and 992.05 is: 1,489.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.39 : 2,721.90 = 992.05 : x
  2. Step 2: Convert to fraction form
    1,813.39/2,721.90 = 992.05/x
  3. Step 3: Cross multiply
    1,813.39x = 2,721.90 × 992.05
  4. Step 4: Simplify right side
    1,813.39x = 2,700,257.81
  5. Step 5: Solve for x
    x = 2,700,257.81/1,813.39
  6. Step 6: Final answer
    x = 1,489.07

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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.