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Finding the Fourth Proportional to 1,885.10, 2,828.51 and 789.71

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Solution

The fourth proportional to 1,885.10, 2,828.51 and 789.71 is: 1,184.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.10 : 2,828.51 = 789.71 : x
  2. Step 2: Convert to fraction form
    1,885.10/2,828.51 = 789.71/x
  3. Step 3: Cross multiply
    1,885.10x = 2,828.51 × 789.71
  4. Step 4: Simplify right side
    1,885.10x = 2,233,698.68
  5. Step 5: Solve for x
    x = 2,233,698.68/1,885.10
  6. Step 6: Final answer
    x = 1,184.92

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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.