Home / 1,791.45-2,686.73-621.36

Finding the Fourth Proportional to 1,791.45, 2,686.73 and 621.36

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Solution

The fourth proportional to 1,791.45, 2,686.73 and 621.36 is: 931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.45 : 2,686.73 = 621.36 : x
  2. Step 2: Convert to fraction form
    1,791.45/2,686.73 = 621.36/x
  3. Step 3: Cross multiply
    1,791.45x = 2,686.73 × 621.36
  4. Step 4: Simplify right side
    1,791.45x = 1,669,423.45
  5. Step 5: Solve for x
    x = 1,669,423.45/1,791.45
  6. Step 6: Final answer
    x = 931.88

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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.