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Finding the Fourth Proportional to 1,653.90, 2,480.94 and 1,190.40

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Solution

The fourth proportional to 1,653.90, 2,480.94 and 1,190.40 is: 1,785.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.90 : 2,480.94 = 1,190.40 : x
  2. Step 2: Convert to fraction form
    1,653.90/2,480.94 = 1,190.40/x
  3. Step 3: Cross multiply
    1,653.90x = 2,480.94 × 1,190.40
  4. Step 4: Simplify right side
    1,653.90x = 2,953,310.98
  5. Step 5: Solve for x
    x = 2,953,310.98/1,653.90
  6. Step 6: Final answer
    x = 1,785.66

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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.