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Finding the Fourth Proportional to 2,838.74, 4,258.10 and 891.10

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Solution

The fourth proportional to 2,838.74, 4,258.10 and 891.10 is: 1,336.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,838.74 : 4,258.10 = 891.10 : x
  2. Step 2: Convert to fraction form
    2,838.74/4,258.10 = 891.10/x
  3. Step 3: Cross multiply
    2,838.74x = 4,258.10 × 891.10
  4. Step 4: Simplify right side
    2,838.74x = 3,794,392.91
  5. Step 5: Solve for x
    x = 3,794,392.91/2,838.74
  6. Step 6: Final answer
    x = 1,336.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.