Home / 1,378.29-2,078.24-1,263.48

Finding the Fourth Proportional to 1,378.29, 2,078.24 and 1,263.48

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Solution

The fourth proportional to 1,378.29, 2,078.24 and 1,263.48 is: 1,905.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.29 : 2,078.24 = 1,263.48 : x
  2. Step 2: Convert to fraction form
    1,378.29/2,078.24 = 1,263.48/x
  3. Step 3: Cross multiply
    1,378.29x = 2,078.24 × 1,263.48
  4. Step 4: Simplify right side
    1,378.29x = 2,625,814.68
  5. Step 5: Solve for x
    x = 2,625,814.68/1,378.29
  6. Step 6: Final answer
    x = 1,905.12

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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.