Home / 3,421.43-4,720.24-1,929

Finding the Fourth Proportional to 3,421.43, 4,720.24 and 1,929

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Solution

The fourth proportional to 3,421.43, 4,720.24 and 1,929 is: 2,661.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.43 : 4,720.24 = 1,929 : x
  2. Step 2: Convert to fraction form
    3,421.43/4,720.24 = 1,929/x
  3. Step 3: Cross multiply
    3,421.43x = 4,720.24 × 1,929
  4. Step 4: Simplify right side
    3,421.43x = 9,105,342.96
  5. Step 5: Solve for x
    x = 9,105,342.96/3,421.43
  6. Step 6: Final answer
    x = 2,661.27

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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.