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Finding the Fourth Proportional to 1,427.57, 1,970.01 and 798.08

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Solution

The fourth proportional to 1,427.57, 1,970.01 and 798.08 is: 1,101.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.57 : 1,970.01 = 798.08 : x
  2. Step 2: Convert to fraction form
    1,427.57/1,970.01 = 798.08/x
  3. Step 3: Cross multiply
    1,427.57x = 1,970.01 × 798.08
  4. Step 4: Simplify right side
    1,427.57x = 1,572,215.73
  5. Step 5: Solve for x
    x = 1,572,215.73/1,427.57
  6. Step 6: Final answer
    x = 1,101.33

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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.