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Finding the Fourth Proportional to 1,885.05, 2,828.68 and 789.32

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Solution

The fourth proportional to 1,885.05, 2,828.68 and 789.32 is: 1,184.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.05 : 2,828.68 = 789.32 : x
  2. Step 2: Convert to fraction form
    1,885.05/2,828.68 = 789.32/x
  3. Step 3: Cross multiply
    1,885.05x = 2,828.68 × 789.32
  4. Step 4: Simplify right side
    1,885.05x = 2,232,738.80
  5. Step 5: Solve for x
    x = 2,232,738.80/1,885.05
  6. Step 6: Final answer
    x = 1,184.45

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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.