Home / 2,122.21-2,928.86-1,178.07

Finding the Fourth Proportional to 2,122.21, 2,928.86 and 1,178.07

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Solution

The fourth proportional to 2,122.21, 2,928.86 and 1,178.07 is: 1,625.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.21 : 2,928.86 = 1,178.07 : x
  2. Step 2: Convert to fraction form
    2,122.21/2,928.86 = 1,178.07/x
  3. Step 3: Cross multiply
    2,122.21x = 2,928.86 × 1,178.07
  4. Step 4: Simplify right side
    2,122.21x = 3,450,402.10
  5. Step 5: Solve for x
    x = 3,450,402.10/2,122.21
  6. Step 6: Final answer
    x = 1,625.85

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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.