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Finding the Fourth Proportional to 1,074.51, 1,610.33 and 612.11

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Solution

The fourth proportional to 1,074.51, 1,610.33 and 612.11 is: 917.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.51 : 1,610.33 = 612.11 : x
  2. Step 2: Convert to fraction form
    1,074.51/1,610.33 = 612.11/x
  3. Step 3: Cross multiply
    1,074.51x = 1,610.33 × 612.11
  4. Step 4: Simplify right side
    1,074.51x = 985,687.98
  5. Step 5: Solve for x
    x = 985,687.98/1,074.51
  6. Step 6: Final answer
    x = 917.34

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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.