Home / 1,140.21-1,568.97-1,111.59

Finding the Fourth Proportional to 1,140.21, 1,568.97 and 1,111.59

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Solution

The fourth proportional to 1,140.21, 1,568.97 and 1,111.59 is: 1,529.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.21 : 1,568.97 = 1,111.59 : x
  2. Step 2: Convert to fraction form
    1,140.21/1,568.97 = 1,111.59/x
  3. Step 3: Cross multiply
    1,140.21x = 1,568.97 × 1,111.59
  4. Step 4: Simplify right side
    1,140.21x = 1,744,051.36
  5. Step 5: Solve for x
    x = 1,744,051.36/1,140.21
  6. Step 6: Final answer
    x = 1,529.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.