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Finding the Fourth Proportional to 1,186.57, 1,635.81 and 1,022.53

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Solution

The fourth proportional to 1,186.57, 1,635.81 and 1,022.53 is: 1,409.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.57 : 1,635.81 = 1,022.53 : x
  2. Step 2: Convert to fraction form
    1,186.57/1,635.81 = 1,022.53/x
  3. Step 3: Cross multiply
    1,186.57x = 1,635.81 × 1,022.53
  4. Step 4: Simplify right side
    1,186.57x = 1,672,659.18
  5. Step 5: Solve for x
    x = 1,672,659.18/1,186.57
  6. Step 6: Final answer
    x = 1,409.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.