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Finding the Fourth Proportional to 3,569.45, 5,355.71 and 1,489.86

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Solution

The fourth proportional to 3,569.45, 5,355.71 and 1,489.86 is: 2,235.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,569.45 : 5,355.71 = 1,489.86 : x
  2. Step 2: Convert to fraction form
    3,569.45/5,355.71 = 1,489.86/x
  3. Step 3: Cross multiply
    3,569.45x = 5,355.71 × 1,489.86
  4. Step 4: Simplify right side
    3,569.45x = 7,979,258.10
  5. Step 5: Solve for x
    x = 7,979,258.10/3,569.45
  6. Step 6: Final answer
    x = 2,235.43

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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.