Home / 1,369.16-1,890.05-1,065.64

Finding the Fourth Proportional to 1,369.16, 1,890.05 and 1,065.64

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Solution

The fourth proportional to 1,369.16, 1,890.05 and 1,065.64 is: 1,471.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.16 : 1,890.05 = 1,065.64 : x
  2. Step 2: Convert to fraction form
    1,369.16/1,890.05 = 1,065.64/x
  3. Step 3: Cross multiply
    1,369.16x = 1,890.05 × 1,065.64
  4. Step 4: Simplify right side
    1,369.16x = 2,014,112.88
  5. Step 5: Solve for x
    x = 2,014,112.88/1,369.16
  6. Step 6: Final answer
    x = 1,471.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.