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Finding the Fourth Proportional to 803.55, 1,108.85 and 454.26

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Solution

The fourth proportional to 803.55, 1,108.85 and 454.26 is: 626.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.55 : 1,108.85 = 454.26 : x
  2. Step 2: Convert to fraction form
    803.55/1,108.85 = 454.26/x
  3. Step 3: Cross multiply
    803.55x = 1,108.85 × 454.26
  4. Step 4: Simplify right side
    803.55x = 503,706.20
  5. Step 5: Solve for x
    x = 503,706.20/803.55
  6. Step 6: Final answer
    x = 626.85

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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.