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Finding the Fourth Proportional to 1,092.06, 1,638.40 and 361.70

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Solution

The fourth proportional to 1,092.06, 1,638.40 and 361.70 is: 542.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.06 : 1,638.40 = 361.70 : x
  2. Step 2: Convert to fraction form
    1,092.06/1,638.40 = 361.70/x
  3. Step 3: Cross multiply
    1,092.06x = 1,638.40 × 361.70
  4. Step 4: Simplify right side
    1,092.06x = 592,609.28
  5. Step 5: Solve for x
    x = 592,609.28/1,092.06
  6. Step 6: Final answer
    x = 542.65

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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.