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Finding the Fourth Proportional to 1,192.16, 1,645.17 and 668.20

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Solution

The fourth proportional to 1,192.16, 1,645.17 and 668.20 is: 922.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.16 : 1,645.17 = 668.20 : x
  2. Step 2: Convert to fraction form
    1,192.16/1,645.17 = 668.20/x
  3. Step 3: Cross multiply
    1,192.16x = 1,645.17 × 668.20
  4. Step 4: Simplify right side
    1,192.16x = 1,099,302.59
  5. Step 5: Solve for x
    x = 1,099,302.59/1,192.16
  6. Step 6: Final answer
    x = 922.11

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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.