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Finding the Fourth Proportional to 1,092.78, 1,638.66 and 476.19

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Solution

The fourth proportional to 1,092.78, 1,638.66 and 476.19 is: 714.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.78 : 1,638.66 = 476.19 : x
  2. Step 2: Convert to fraction form
    1,092.78/1,638.66 = 476.19/x
  3. Step 3: Cross multiply
    1,092.78x = 1,638.66 × 476.19
  4. Step 4: Simplify right side
    1,092.78x = 780,313.51
  5. Step 5: Solve for x
    x = 780,313.51/1,092.78
  6. Step 6: Final answer
    x = 714.06

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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.