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Finding the Fourth Proportional to 1,872.39, 2,803.33 and 992.91

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Solution

The fourth proportional to 1,872.39, 2,803.33 and 992.91 is: 1,486.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.39 : 2,803.33 = 992.91 : x
  2. Step 2: Convert to fraction form
    1,872.39/2,803.33 = 992.91/x
  3. Step 3: Cross multiply
    1,872.39x = 2,803.33 × 992.91
  4. Step 4: Simplify right side
    1,872.39x = 2,783,454.39
  5. Step 5: Solve for x
    x = 2,783,454.39/1,872.39
  6. Step 6: Final answer
    x = 1,486.58

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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.