Home / 2,911-4,015.36-1,731.28

Finding the Fourth Proportional to 2,911, 4,015.36 and 1,731.28

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Solution

The fourth proportional to 2,911, 4,015.36 and 1,731.28 is: 2,388.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911 : 4,015.36 = 1,731.28 : x
  2. Step 2: Convert to fraction form
    2,911/4,015.36 = 1,731.28/x
  3. Step 3: Cross multiply
    2,911x = 4,015.36 × 1,731.28
  4. Step 4: Simplify right side
    2,911x = 6,951,712.46
  5. Step 5: Solve for x
    x = 6,951,712.46/2,911
  6. Step 6: Final answer
    x = 2,388.08

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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.