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Finding the Fourth Proportional to 1,108.93, 1,663.80 and 378.73

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Solution

The fourth proportional to 1,108.93, 1,663.80 and 378.73 is: 568.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.93 : 1,663.80 = 378.73 : x
  2. Step 2: Convert to fraction form
    1,108.93/1,663.80 = 378.73/x
  3. Step 3: Cross multiply
    1,108.93x = 1,663.80 × 378.73
  4. Step 4: Simplify right side
    1,108.93x = 630,130.97
  5. Step 5: Solve for x
    x = 630,130.97/1,108.93
  6. Step 6: Final answer
    x = 568.23

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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.