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Finding the Fourth Proportional to 1,114.09, 1,667.40 and 919.06

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Solution

The fourth proportional to 1,114.09, 1,667.40 and 919.06 is: 1,375.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.09 : 1,667.40 = 919.06 : x
  2. Step 2: Convert to fraction form
    1,114.09/1,667.40 = 919.06/x
  3. Step 3: Cross multiply
    1,114.09x = 1,667.40 × 919.06
  4. Step 4: Simplify right side
    1,114.09x = 1,532,440.64
  5. Step 5: Solve for x
    x = 1,532,440.64/1,114.09
  6. Step 6: Final answer
    x = 1,375.51

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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.