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Finding the Fourth Proportional to 1,168.73, 1,753.02 and 428.79

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Solution

The fourth proportional to 1,168.73, 1,753.02 and 428.79 is: 643.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.73 : 1,753.02 = 428.79 : x
  2. Step 2: Convert to fraction form
    1,168.73/1,753.02 = 428.79/x
  3. Step 3: Cross multiply
    1,168.73x = 1,753.02 × 428.79
  4. Step 4: Simplify right side
    1,168.73x = 751,677.45
  5. Step 5: Solve for x
    x = 751,677.45/1,168.73
  6. Step 6: Final answer
    x = 643.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.