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Finding the Fourth Proportional to 1,092.08, 1,638.12 and 442.38

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Solution

The fourth proportional to 1,092.08, 1,638.12 and 442.38 is: 663.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.08 : 1,638.12 = 442.38 : x
  2. Step 2: Convert to fraction form
    1,092.08/1,638.12 = 442.38/x
  3. Step 3: Cross multiply
    1,092.08x = 1,638.12 × 442.38
  4. Step 4: Simplify right side
    1,092.08x = 724,671.53
  5. Step 5: Solve for x
    x = 724,671.53/1,092.08
  6. Step 6: Final answer
    x = 663.57

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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.