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Finding the Fourth Proportional to 2,827.12, 3,900 and 1,894

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Solution

The fourth proportional to 2,827.12, 3,900 and 1,894 is: 2,612.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,827.12 : 3,900 = 1,894 : x
  2. Step 2: Convert to fraction form
    2,827.12/3,900 = 1,894/x
  3. Step 3: Cross multiply
    2,827.12x = 3,900 × 1,894
  4. Step 4: Simplify right side
    2,827.12x = 7,386,600
  5. Step 5: Solve for x
    x = 7,386,600/2,827.12
  6. Step 6: Final answer
    x = 2,612.76

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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.