Home / 3,421.62-4,721.89-1,929.61

Finding the Fourth Proportional to 3,421.62, 4,721.89 and 1,929.61

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Solution

The fourth proportional to 3,421.62, 4,721.89 and 1,929.61 is: 2,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.62 : 4,721.89 = 1,929.61 : x
  2. Step 2: Convert to fraction form
    3,421.62/4,721.89 = 1,929.61/x
  3. Step 3: Cross multiply
    3,421.62x = 4,721.89 × 1,929.61
  4. Step 4: Simplify right side
    3,421.62x = 9,111,406.16
  5. Step 5: Solve for x
    x = 9,111,406.16/3,421.62
  6. Step 6: Final answer
    x = 2,662.89

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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.