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Finding the Fourth Proportional to 1,108.41, 1,663.07 and 459.60

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Solution

The fourth proportional to 1,108.41, 1,663.07 and 459.60 is: 689.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.41 : 1,663.07 = 459.60 : x
  2. Step 2: Convert to fraction form
    1,108.41/1,663.07 = 459.60/x
  3. Step 3: Cross multiply
    1,108.41x = 1,663.07 × 459.60
  4. Step 4: Simplify right side
    1,108.41x = 764,344.67
  5. Step 5: Solve for x
    x = 764,344.67/1,108.41
  6. Step 6: Final answer
    x = 689.59

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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.