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Finding the Fourth Proportional to 3,833.69, 5,289.80 and 2,155.17

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Solution

The fourth proportional to 3,833.69, 5,289.80 and 2,155.17 is: 2,973.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,833.69 : 5,289.80 = 2,155.17 : x
  2. Step 2: Convert to fraction form
    3,833.69/5,289.80 = 2,155.17/x
  3. Step 3: Cross multiply
    3,833.69x = 5,289.80 × 2,155.17
  4. Step 4: Simplify right side
    3,833.69x = 11,400,407.49
  5. Step 5: Solve for x
    x = 11,400,407.49/3,833.69
  6. Step 6: Final answer
    x = 2,973.75

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1.5x scale

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.