Home / 2,421.14-3,631.32-689.36

Finding the Fourth Proportional to 2,421.14, 3,631.32 and 689.36

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Solution

The fourth proportional to 2,421.14, 3,631.32 and 689.36 is: 1,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.14 : 3,631.32 = 689.36 : x
  2. Step 2: Convert to fraction form
    2,421.14/3,631.32 = 689.36/x
  3. Step 3: Cross multiply
    2,421.14x = 3,631.32 × 689.36
  4. Step 4: Simplify right side
    2,421.14x = 2,503,286.76
  5. Step 5: Solve for x
    x = 2,503,286.76/2,421.14
  6. Step 6: Final answer
    x = 1,033.93

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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.