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Finding the Fourth Proportional to 803.09, 1,108.22 and 453.75

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Solution

The fourth proportional to 803.09, 1,108.22 and 453.75 is: 626.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.09 : 1,108.22 = 453.75 : x
  2. Step 2: Convert to fraction form
    803.09/1,108.22 = 453.75/x
  3. Step 3: Cross multiply
    803.09x = 1,108.22 × 453.75
  4. Step 4: Simplify right side
    803.09x = 502,852.56
  5. Step 5: Solve for x
    x = 502,852.56/803.09
  6. Step 6: Final answer
    x = 626.15

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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.