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Finding the Fourth Proportional to 1,207.87, 1,811.44 and 514.54

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Solution

The fourth proportional to 1,207.87, 1,811.44 and 514.54 is: 771.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.87 : 1,811.44 = 514.54 : x
  2. Step 2: Convert to fraction form
    1,207.87/1,811.44 = 514.54/x
  3. Step 3: Cross multiply
    1,207.87x = 1,811.44 × 514.54
  4. Step 4: Simplify right side
    1,207.87x = 932,058.34
  5. Step 5: Solve for x
    x = 932,058.34/1,207.87
  6. Step 6: Final answer
    x = 771.65

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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.