Home / 1,538.19-2,122.32-900.01

Finding the Fourth Proportional to 1,538.19, 2,122.32 and 900.01

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Solution

The fourth proportional to 1,538.19, 2,122.32 and 900.01 is: 1,241.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.19 : 2,122.32 = 900.01 : x
  2. Step 2: Convert to fraction form
    1,538.19/2,122.32 = 900.01/x
  3. Step 3: Cross multiply
    1,538.19x = 2,122.32 × 900.01
  4. Step 4: Simplify right side
    1,538.19x = 1,910,109.22
  5. Step 5: Solve for x
    x = 1,910,109.22/1,538.19
  6. Step 6: Final answer
    x = 1,241.79

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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.