Home / 2,122.90-2,928.98-1,376.88

Finding the Fourth Proportional to 2,122.90, 2,928.98 and 1,376.88

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Solution

The fourth proportional to 2,122.90, 2,928.98 and 1,376.88 is: 1,899.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.90 : 2,928.98 = 1,376.88 : x
  2. Step 2: Convert to fraction form
    2,122.90/2,928.98 = 1,376.88/x
  3. Step 3: Cross multiply
    2,122.90x = 2,928.98 × 1,376.88
  4. Step 4: Simplify right side
    2,122.90x = 4,032,853.98
  5. Step 5: Solve for x
    x = 4,032,853.98/2,122.90
  6. Step 6: Final answer
    x = 1,899.69

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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.