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Finding the Fourth Proportional to 803.35, 1,205.13 and 283.23

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Solution

The fourth proportional to 803.35, 1,205.13 and 283.23 is: 424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.35 : 1,205.13 = 283.23 : x
  2. Step 2: Convert to fraction form
    803.35/1,205.13 = 283.23/x
  3. Step 3: Cross multiply
    803.35x = 1,205.13 × 283.23
  4. Step 4: Simplify right side
    803.35x = 341,321.53
  5. Step 5: Solve for x
    x = 341,321.53/803.35
  6. Step 6: Final answer
    x = 424.88

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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.