Home / 3,421.83-4,722.81-1,929.79

Finding the Fourth Proportional to 3,421.83, 4,722.81 and 1,929.79

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Solution

The fourth proportional to 3,421.83, 4,722.81 and 1,929.79 is: 2,663.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.83 : 4,722.81 = 1,929.79 : x
  2. Step 2: Convert to fraction form
    3,421.83/4,722.81 = 1,929.79/x
  3. Step 3: Cross multiply
    3,421.83x = 4,722.81 × 1,929.79
  4. Step 4: Simplify right side
    3,421.83x = 9,114,007.90
  5. Step 5: Solve for x
    x = 9,114,007.90/3,421.83
  6. Step 6: Final answer
    x = 2,663.49

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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.