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Finding the Fourth Proportional to 1,092.13, 1,638.47 and 322.63

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Solution

The fourth proportional to 1,092.13, 1,638.47 and 322.63 is: 484.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.13 : 1,638.47 = 322.63 : x
  2. Step 2: Convert to fraction form
    1,092.13/1,638.47 = 322.63/x
  3. Step 3: Cross multiply
    1,092.13x = 1,638.47 × 322.63
  4. Step 4: Simplify right side
    1,092.13x = 528,609.77
  5. Step 5: Solve for x
    x = 528,609.77/1,092.13
  6. Step 6: Final answer
    x = 484.02

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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.