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Finding the Fourth Proportional to 1,207.63, 1,810.97 and 514.61

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Solution

The fourth proportional to 1,207.63, 1,810.97 and 514.61 is: 771.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.63 : 1,810.97 = 514.61 : x
  2. Step 2: Convert to fraction form
    1,207.63/1,810.97 = 514.61/x
  3. Step 3: Cross multiply
    1,207.63x = 1,810.97 × 514.61
  4. Step 4: Simplify right side
    1,207.63x = 931,940.70
  5. Step 5: Solve for x
    x = 931,940.70/1,207.63
  6. Step 6: Final answer
    x = 771.71

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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.