Home / 1,134.36-1,712-1,105.20

Finding the Fourth Proportional to 1,134.36, 1,712 and 1,105.20

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Solution

The fourth proportional to 1,134.36, 1,712 and 1,105.20 is: 1,667.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.36 : 1,712 = 1,105.20 : x
  2. Step 2: Convert to fraction form
    1,134.36/1,712 = 1,105.20/x
  3. Step 3: Cross multiply
    1,134.36x = 1,712 × 1,105.20
  4. Step 4: Simplify right side
    1,134.36x = 1,892,102.40
  5. Step 5: Solve for x
    x = 1,892,102.40/1,134.36
  6. Step 6: Final answer
    x = 1,667.99

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.