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Finding the Fourth Proportional to 1,180.87, 1,770.06 and 400.13

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Solution

The fourth proportional to 1,180.87, 1,770.06 and 400.13 is: 599.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.87 : 1,770.06 = 400.13 : x
  2. Step 2: Convert to fraction form
    1,180.87/1,770.06 = 400.13/x
  3. Step 3: Cross multiply
    1,180.87x = 1,770.06 × 400.13
  4. Step 4: Simplify right side
    1,180.87x = 708,258.53
  5. Step 5: Solve for x
    x = 708,258.53/1,180.87
  6. Step 6: Final answer
    x = 599.78

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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.