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Finding the Fourth Proportional to 808.04, 1,211.64 and 287.84

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Solution

The fourth proportional to 808.04, 1,211.64 and 287.84 is: 431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.04 : 1,211.64 = 287.84 : x
  2. Step 2: Convert to fraction form
    808.04/1,211.64 = 287.84/x
  3. Step 3: Cross multiply
    808.04x = 1,211.64 × 287.84
  4. Step 4: Simplify right side
    808.04x = 348,758.46
  5. Step 5: Solve for x
    x = 348,758.46/808.04
  6. Step 6: Final answer
    x = 431.61

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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.