Home / 1,162.11-1,742.35-431.49

Finding the Fourth Proportional to 1,162.11, 1,742.35 and 431.49

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Solution

The fourth proportional to 1,162.11, 1,742.35 and 431.49 is: 646.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.11 : 1,742.35 = 431.49 : x
  2. Step 2: Convert to fraction form
    1,162.11/1,742.35 = 431.49/x
  3. Step 3: Cross multiply
    1,162.11x = 1,742.35 × 431.49
  4. Step 4: Simplify right side
    1,162.11x = 751,806.60
  5. Step 5: Solve for x
    x = 751,806.60/1,162.11
  6. Step 6: Final answer
    x = 646.93

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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.