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Finding the Fourth Proportional to 2,122.92, 2,929.02 and 1,376.88

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Solution

The fourth proportional to 2,122.92, 2,929.02 and 1,376.88 is: 1,899.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.92 : 2,929.02 = 1,376.88 : x
  2. Step 2: Convert to fraction form
    2,122.92/2,929.02 = 1,376.88/x
  3. Step 3: Cross multiply
    2,122.92x = 2,929.02 × 1,376.88
  4. Step 4: Simplify right side
    2,122.92x = 4,032,909.06
  5. Step 5: Solve for x
    x = 4,032,909.06/2,122.92
  6. Step 6: Final answer
    x = 1,899.70

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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.