Home / 2,421.08-3,631.65-689.70

Finding the Fourth Proportional to 2,421.08, 3,631.65 and 689.70

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Solution

The fourth proportional to 2,421.08, 3,631.65 and 689.70 is: 1,034.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.08 : 3,631.65 = 689.70 : x
  2. Step 2: Convert to fraction form
    2,421.08/3,631.65 = 689.70/x
  3. Step 3: Cross multiply
    2,421.08x = 3,631.65 × 689.70
  4. Step 4: Simplify right side
    2,421.08x = 2,504,749.01
  5. Step 5: Solve for x
    x = 2,504,749.01/2,421.08
  6. Step 6: Final answer
    x = 1,034.56

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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.