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Finding the Fourth Proportional to 800.18, 1,104.54 and 505.64

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Solution

The fourth proportional to 800.18, 1,104.54 and 505.64 is: 697.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.18 : 1,104.54 = 505.64 : x
  2. Step 2: Convert to fraction form
    800.18/1,104.54 = 505.64/x
  3. Step 3: Cross multiply
    800.18x = 1,104.54 × 505.64
  4. Step 4: Simplify right side
    800.18x = 558,499.61
  5. Step 5: Solve for x
    x = 558,499.61/800.18
  6. Step 6: Final answer
    x = 697.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.