Home / 1,489.36-2,054.10-1,069.78

Finding the Fourth Proportional to 1,489.36, 2,054.10 and 1,069.78

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Solution

The fourth proportional to 1,489.36, 2,054.10 and 1,069.78 is: 1,475.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.36 : 2,054.10 = 1,069.78 : x
  2. Step 2: Convert to fraction form
    1,489.36/2,054.10 = 1,069.78/x
  3. Step 3: Cross multiply
    1,489.36x = 2,054.10 × 1,069.78
  4. Step 4: Simplify right side
    1,489.36x = 2,197,435.10
  5. Step 5: Solve for x
    x = 2,197,435.10/1,489.36
  6. Step 6: Final answer
    x = 1,475.42

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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.