Home / 1,369.36-2,063.56-1,239.40

Finding the Fourth Proportional to 1,369.36, 2,063.56 and 1,239.40

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Solution

The fourth proportional to 1,369.36, 2,063.56 and 1,239.40 is: 1,867.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.36 : 2,063.56 = 1,239.40 : x
  2. Step 2: Convert to fraction form
    1,369.36/2,063.56 = 1,239.40/x
  3. Step 3: Cross multiply
    1,369.36x = 2,063.56 × 1,239.40
  4. Step 4: Simplify right side
    1,369.36x = 2,557,576.26
  5. Step 5: Solve for x
    x = 2,557,576.26/1,369.36
  6. Step 6: Final answer
    x = 1,867.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.