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Finding the Fourth Proportional to 1,869.06, 2,802.61 and 992.06

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Solution

The fourth proportional to 1,869.06, 2,802.61 and 992.06 is: 1,487.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.06 : 2,802.61 = 992.06 : x
  2. Step 2: Convert to fraction form
    1,869.06/2,802.61 = 992.06/x
  3. Step 3: Cross multiply
    1,869.06x = 2,802.61 × 992.06
  4. Step 4: Simplify right side
    1,869.06x = 2,780,340.78
  5. Step 5: Solve for x
    x = 2,780,340.78/1,869.06
  6. Step 6: Final answer
    x = 1,487.56

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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.