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Finding the Fourth Proportional to 1,437.87, 1,994.35 and 1,379.55

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Solution

The fourth proportional to 1,437.87, 1,994.35 and 1,379.55 is: 1,913.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.87 : 1,994.35 = 1,379.55 : x
  2. Step 2: Convert to fraction form
    1,437.87/1,994.35 = 1,379.55/x
  3. Step 3: Cross multiply
    1,437.87x = 1,994.35 × 1,379.55
  4. Step 4: Simplify right side
    1,437.87x = 2,751,305.54
  5. Step 5: Solve for x
    x = 2,751,305.54/1,437.87
  6. Step 6: Final answer
    x = 1,913.46

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.