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Finding the Fourth Proportional to 690.95, 1,036.41 and 204.03

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Solution

The fourth proportional to 690.95, 1,036.41 and 204.03 is: 306.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.95 : 1,036.41 = 204.03 : x
  2. Step 2: Convert to fraction form
    690.95/1,036.41 = 204.03/x
  3. Step 3: Cross multiply
    690.95x = 1,036.41 × 204.03
  4. Step 4: Simplify right side
    690.95x = 211,458.73
  5. Step 5: Solve for x
    x = 211,458.73/690.95
  6. Step 6: Final answer
    x = 306.04

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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.