Home / 1,350.09-2,021.36-690.55

Finding the Fourth Proportional to 1,350.09, 2,021.36 and 690.55

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Solution

The fourth proportional to 1,350.09, 2,021.36 and 690.55 is: 1,033.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.09 : 2,021.36 = 690.55 : x
  2. Step 2: Convert to fraction form
    1,350.09/2,021.36 = 690.55/x
  3. Step 3: Cross multiply
    1,350.09x = 2,021.36 × 690.55
  4. Step 4: Simplify right side
    1,350.09x = 1,395,846.82
  5. Step 5: Solve for x
    x = 1,395,846.82/1,350.09
  6. Step 6: Final answer
    x = 1,033.89

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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.