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Finding the Fourth Proportional to 803.43, 1,108.76 and 454.11

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Solution

The fourth proportional to 803.43, 1,108.76 and 454.11 is: 626.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.43 : 1,108.76 = 454.11 : x
  2. Step 2: Convert to fraction form
    803.43/1,108.76 = 454.11/x
  3. Step 3: Cross multiply
    803.43x = 1,108.76 × 454.11
  4. Step 4: Simplify right side
    803.43x = 503,496.73
  5. Step 5: Solve for x
    x = 503,496.73/803.43
  6. Step 6: Final answer
    x = 626.68

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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.