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Finding the Fourth Proportional to 1,106.44, 1,526.88 and 640.69

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Solution

The fourth proportional to 1,106.44, 1,526.88 and 640.69 is: 884.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.44 : 1,526.88 = 640.69 : x
  2. Step 2: Convert to fraction form
    1,106.44/1,526.88 = 640.69/x
  3. Step 3: Cross multiply
    1,106.44x = 1,526.88 × 640.69
  4. Step 4: Simplify right side
    1,106.44x = 978,255.33
  5. Step 5: Solve for x
    x = 978,255.33/1,106.44
  6. Step 6: Final answer
    x = 884.15

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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.