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Finding the Fourth Proportional to 1,538.44, 2,123.03 and 875.29

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Solution

The fourth proportional to 1,538.44, 2,123.03 and 875.29 is: 1,207.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.44 : 2,123.03 = 875.29 : x
  2. Step 2: Convert to fraction form
    1,538.44/2,123.03 = 875.29/x
  3. Step 3: Cross multiply
    1,538.44x = 2,123.03 × 875.29
  4. Step 4: Simplify right side
    1,538.44x = 1,858,262.87
  5. Step 5: Solve for x
    x = 1,858,262.87/1,538.44
  6. Step 6: Final answer
    x = 1,207.89

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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.