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Finding the Fourth Proportional to 854.30, 1,281.45 and 205.03

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Solution

The fourth proportional to 854.30, 1,281.45 and 205.03 is: 307.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.30 : 1,281.45 = 205.03 : x
  2. Step 2: Convert to fraction form
    854.30/1,281.45 = 205.03/x
  3. Step 3: Cross multiply
    854.30x = 1,281.45 × 205.03
  4. Step 4: Simplify right side
    854.30x = 262,736.33
  5. Step 5: Solve for x
    x = 262,736.33/854.30
  6. Step 6: Final answer
    x = 307.55

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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.