Home / 2,122.58-2,929.43-1,238.40

Finding the Fourth Proportional to 2,122.58, 2,929.43 and 1,238.40

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Solution

The fourth proportional to 2,122.58, 2,929.43 and 1,238.40 is: 1,709.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.58 : 2,929.43 = 1,238.40 : x
  2. Step 2: Convert to fraction form
    2,122.58/2,929.43 = 1,238.40/x
  3. Step 3: Cross multiply
    2,122.58x = 2,929.43 × 1,238.40
  4. Step 4: Simplify right side
    2,122.58x = 3,627,800.97
  5. Step 5: Solve for x
    x = 3,627,800.97/2,122.58
  6. Step 6: Final answer
    x = 1,709.15

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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.