Home / 1,262.21-1,883.75-1,229.40

Finding the Fourth Proportional to 1,262.21, 1,883.75 and 1,229.40

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Solution

The fourth proportional to 1,262.21, 1,883.75 and 1,229.40 is: 1,834.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.21 : 1,883.75 = 1,229.40 : x
  2. Step 2: Convert to fraction form
    1,262.21/1,883.75 = 1,229.40/x
  3. Step 3: Cross multiply
    1,262.21x = 1,883.75 × 1,229.40
  4. Step 4: Simplify right side
    1,262.21x = 2,315,876.10
  5. Step 5: Solve for x
    x = 2,315,876.10/1,262.21
  6. Step 6: Final answer
    x = 1,834.79

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1.5x scale

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.