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Finding the Fourth Proportional to 2,855.25, 4,282.88 and 803.25

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Solution

The fourth proportional to 2,855.25, 4,282.88 and 803.25 is: 1,204.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.25 : 4,282.88 = 803.25 : x
  2. Step 2: Convert to fraction form
    2,855.25/4,282.88 = 803.25/x
  3. Step 3: Cross multiply
    2,855.25x = 4,282.88 × 803.25
  4. Step 4: Simplify right side
    2,855.25x = 3,440,219.34
  5. Step 5: Solve for x
    x = 3,440,219.34/2,855.25
  6. Step 6: Final answer
    x = 1,204.88

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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.