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Finding the Fourth Proportional to 1,190.37, 1,785.72 and 368.70

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Solution

The fourth proportional to 1,190.37, 1,785.72 and 368.70 is: 553.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.37 : 1,785.72 = 368.70 : x
  2. Step 2: Convert to fraction form
    1,190.37/1,785.72 = 368.70/x
  3. Step 3: Cross multiply
    1,190.37x = 1,785.72 × 368.70
  4. Step 4: Simplify right side
    1,190.37x = 658,401.66
  5. Step 5: Solve for x
    x = 658,401.66/1,190.37
  6. Step 6: Final answer
    x = 553.11

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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.