Home / 3,419.72-5,120.71-2,929.28

Finding the Fourth Proportional to 3,419.72, 5,120.71 and 2,929.28

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Solution

The fourth proportional to 3,419.72, 5,120.71 and 2,929.28 is: 4,386.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.72 : 5,120.71 = 2,929.28 : x
  2. Step 2: Convert to fraction form
    3,419.72/5,120.71 = 2,929.28/x
  3. Step 3: Cross multiply
    3,419.72x = 5,120.71 × 2,929.28
  4. Step 4: Simplify right side
    3,419.72x = 14,999,960.46
  5. Step 5: Solve for x
    x = 14,999,960.46/3,419.72
  6. Step 6: Final answer
    x = 4,386.31

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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.