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Finding the Fourth Proportional to 1,075.36, 1,611.87 and 451.06

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Solution

The fourth proportional to 1,075.36, 1,611.87 and 451.06 is: 676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.36 : 1,611.87 = 451.06 : x
  2. Step 2: Convert to fraction form
    1,075.36/1,611.87 = 451.06/x
  3. Step 3: Cross multiply
    1,075.36x = 1,611.87 × 451.06
  4. Step 4: Simplify right side
    1,075.36x = 727,039.77
  5. Step 5: Solve for x
    x = 727,039.77/1,075.36
  6. Step 6: Final answer
    x = 676.09

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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.