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Finding the Fourth Proportional to 2,885.90, 3,979.88 and 1,927.12

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Solution

The fourth proportional to 2,885.90, 3,979.88 and 1,927.12 is: 2,657.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,885.90 : 3,979.88 = 1,927.12 : x
  2. Step 2: Convert to fraction form
    2,885.90/3,979.88 = 1,927.12/x
  3. Step 3: Cross multiply
    2,885.90x = 3,979.88 × 1,927.12
  4. Step 4: Simplify right side
    2,885.90x = 7,669,706.35
  5. Step 5: Solve for x
    x = 7,669,706.35/2,885.90
  6. Step 6: Final answer
    x = 2,657.65

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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.