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Finding the Fourth Proportional to 4,200.76, 6,298.98 and 1,891

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Solution

The fourth proportional to 4,200.76, 6,298.98 and 1,891 is: 2,835.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,200.76 : 6,298.98 = 1,891 : x
  2. Step 2: Convert to fraction form
    4,200.76/6,298.98 = 1,891/x
  3. Step 3: Cross multiply
    4,200.76x = 6,298.98 × 1,891
  4. Step 4: Simplify right side
    4,200.76x = 11,911,371.18
  5. Step 5: Solve for x
    x = 11,911,371.18/4,200.76
  6. Step 6: Final answer
    x = 2,835.53

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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.