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Finding the Fourth Proportional to 1,168.09, 1,611.97 and 644.12

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Solution

The fourth proportional to 1,168.09, 1,611.97 and 644.12 is: 888.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.09 : 1,611.97 = 644.12 : x
  2. Step 2: Convert to fraction form
    1,168.09/1,611.97 = 644.12/x
  3. Step 3: Cross multiply
    1,168.09x = 1,611.97 × 644.12
  4. Step 4: Simplify right side
    1,168.09x = 1,038,302.12
  5. Step 5: Solve for x
    x = 1,038,302.12/1,168.09
  6. Step 6: Final answer
    x = 888.89

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1.5x scale

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.