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Finding the Fourth Proportional to 1,136.37, 1,568.08 and 694.72

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Solution

The fourth proportional to 1,136.37, 1,568.08 and 694.72 is: 958.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.37 : 1,568.08 = 694.72 : x
  2. Step 2: Convert to fraction form
    1,136.37/1,568.08 = 694.72/x
  3. Step 3: Cross multiply
    1,136.37x = 1,568.08 × 694.72
  4. Step 4: Simplify right side
    1,136.37x = 1,089,370.88
  5. Step 5: Solve for x
    x = 1,089,370.88/1,136.37
  6. Step 6: Final answer
    x = 958.64

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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.