Home / 2,421.19-3,632.34-689.82

Finding the Fourth Proportional to 2,421.19, 3,632.34 and 689.82

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Solution

The fourth proportional to 2,421.19, 3,632.34 and 689.82 is: 1,034.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.19 : 3,632.34 = 689.82 : x
  2. Step 2: Convert to fraction form
    2,421.19/3,632.34 = 689.82/x
  3. Step 3: Cross multiply
    2,421.19x = 3,632.34 × 689.82
  4. Step 4: Simplify right side
    2,421.19x = 2,505,649.74
  5. Step 5: Solve for x
    x = 2,505,649.74/2,421.19
  6. Step 6: Final answer
    x = 1,034.88

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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.