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Finding the Fourth Proportional to 1,898.87, 2,621.23 and 1,339.76

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Solution

The fourth proportional to 1,898.87, 2,621.23 and 1,339.76 is: 1,849.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.87 : 2,621.23 = 1,339.76 : x
  2. Step 2: Convert to fraction form
    1,898.87/2,621.23 = 1,339.76/x
  3. Step 3: Cross multiply
    1,898.87x = 2,621.23 × 1,339.76
  4. Step 4: Simplify right side
    1,898.87x = 3,511,822.31
  5. Step 5: Solve for x
    x = 3,511,822.31/1,898.87
  6. Step 6: Final answer
    x = 1,849.43

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Double scale
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Similar ratio
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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.