Home / 1,368.36-1,886.90-1,257.39

Finding the Fourth Proportional to 1,368.36, 1,886.90 and 1,257.39

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Solution

The fourth proportional to 1,368.36, 1,886.90 and 1,257.39 is: 1,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.36 : 1,886.90 = 1,257.39 : x
  2. Step 2: Convert to fraction form
    1,368.36/1,886.90 = 1,257.39/x
  3. Step 3: Cross multiply
    1,368.36x = 1,886.90 × 1,257.39
  4. Step 4: Simplify right side
    1,368.36x = 2,372,562.90
  5. Step 5: Solve for x
    x = 2,372,562.90/1,368.36
  6. Step 6: Final answer
    x = 1,733.87

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1.5x scale

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.