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Finding the Fourth Proportional to 1,427.87, 1,970.23 and 798.37

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Solution

The fourth proportional to 1,427.87, 1,970.23 and 798.37 is: 1,101.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.87 : 1,970.23 = 798.37 : x
  2. Step 2: Convert to fraction form
    1,427.87/1,970.23 = 798.37/x
  3. Step 3: Cross multiply
    1,427.87x = 1,970.23 × 798.37
  4. Step 4: Simplify right side
    1,427.87x = 1,572,972.53
  5. Step 5: Solve for x
    x = 1,572,972.53/1,427.87
  6. Step 6: Final answer
    x = 1,101.62

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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.