Home / 3,421.61-4,721.79-1,929.45

Finding the Fourth Proportional to 3,421.61, 4,721.79 and 1,929.45

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Solution

The fourth proportional to 3,421.61, 4,721.79 and 1,929.45 is: 2,662.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.61 : 4,721.79 = 1,929.45 : x
  2. Step 2: Convert to fraction form
    3,421.61/4,721.79 = 1,929.45/x
  3. Step 3: Cross multiply
    3,421.61x = 4,721.79 × 1,929.45
  4. Step 4: Simplify right side
    3,421.61x = 9,110,457.72
  5. Step 5: Solve for x
    x = 9,110,457.72/3,421.61
  6. Step 6: Final answer
    x = 2,662.62

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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.