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Finding the Fourth Proportional to 1,207.97, 1,811.57 and 622.89

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Solution

The fourth proportional to 1,207.97, 1,811.57 and 622.89 is: 934.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.97 : 1,811.57 = 622.89 : x
  2. Step 2: Convert to fraction form
    1,207.97/1,811.57 = 622.89/x
  3. Step 3: Cross multiply
    1,207.97x = 1,811.57 × 622.89
  4. Step 4: Simplify right side
    1,207.97x = 1,128,405.72
  5. Step 5: Solve for x
    x = 1,128,405.72/1,207.97
  6. Step 6: Final answer
    x = 934.13

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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.