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Finding the Fourth Proportional to 1,190.57, 1,785.35 and 368.63

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Solution

The fourth proportional to 1,190.57, 1,785.35 and 368.63 is: 552.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.57 : 1,785.35 = 368.63 : x
  2. Step 2: Convert to fraction form
    1,190.57/1,785.35 = 368.63/x
  3. Step 3: Cross multiply
    1,190.57x = 1,785.35 × 368.63
  4. Step 4: Simplify right side
    1,190.57x = 658,122.80
  5. Step 5: Solve for x
    x = 658,122.80/1,190.57
  6. Step 6: Final answer
    x = 552.78

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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.