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Finding the Fourth Proportional to 1,230.62, 1,847.55 and 1,128.74

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Solution

The fourth proportional to 1,230.62, 1,847.55 and 1,128.74 is: 1,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.62 : 1,847.55 = 1,128.74 : x
  2. Step 2: Convert to fraction form
    1,230.62/1,847.55 = 1,128.74/x
  3. Step 3: Cross multiply
    1,230.62x = 1,847.55 × 1,128.74
  4. Step 4: Simplify right side
    1,230.62x = 2,085,403.59
  5. Step 5: Solve for x
    x = 2,085,403.59/1,230.62
  6. Step 6: Final answer
    x = 1,694.60

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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.