Home / 3,417.78-5,127.60-1,109.28

Finding the Fourth Proportional to 3,417.78, 5,127.60 and 1,109.28

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Solution

The fourth proportional to 3,417.78, 5,127.60 and 1,109.28 is: 1,664.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,417.78 : 5,127.60 = 1,109.28 : x
  2. Step 2: Convert to fraction form
    3,417.78/5,127.60 = 1,109.28/x
  3. Step 3: Cross multiply
    3,417.78x = 5,127.60 × 1,109.28
  4. Step 4: Simplify right side
    3,417.78x = 5,687,944.13
  5. Step 5: Solve for x
    x = 5,687,944.13/3,417.78
  6. Step 6: Final answer
    x = 1,664.22

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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.