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Finding the Fourth Proportional to 1,114.23, 1,669.51 and 789.01

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Solution

The fourth proportional to 1,114.23, 1,669.51 and 789.01 is: 1,182.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.23 : 1,669.51 = 789.01 : x
  2. Step 2: Convert to fraction form
    1,114.23/1,669.51 = 789.01/x
  3. Step 3: Cross multiply
    1,114.23x = 1,669.51 × 789.01
  4. Step 4: Simplify right side
    1,114.23x = 1,317,260.09
  5. Step 5: Solve for x
    x = 1,317,260.09/1,114.23
  6. Step 6: Final answer
    x = 1,182.22

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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.