Home / 1,291.39-1,924.26-1,228.64

Finding the Fourth Proportional to 1,291.39, 1,924.26 and 1,228.64

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Solution

The fourth proportional to 1,291.39, 1,924.26 and 1,228.64 is: 1,830.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.39 : 1,924.26 = 1,228.64 : x
  2. Step 2: Convert to fraction form
    1,291.39/1,924.26 = 1,228.64/x
  3. Step 3: Cross multiply
    1,291.39x = 1,924.26 × 1,228.64
  4. Step 4: Simplify right side
    1,291.39x = 2,364,218.94
  5. Step 5: Solve for x
    x = 2,364,218.94/1,291.39
  6. Step 6: Final answer
    x = 1,830.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.