Home / 1,538.19-2,305.29-879.05

Finding the Fourth Proportional to 1,538.19, 2,305.29 and 879.05

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Solution

The fourth proportional to 1,538.19, 2,305.29 and 879.05 is: 1,317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.19 : 2,305.29 = 879.05 : x
  2. Step 2: Convert to fraction form
    1,538.19/2,305.29 = 879.05/x
  3. Step 3: Cross multiply
    1,538.19x = 2,305.29 × 879.05
  4. Step 4: Simplify right side
    1,538.19x = 2,026,465.17
  5. Step 5: Solve for x
    x = 2,026,465.17/1,538.19
  6. Step 6: Final answer
    x = 1,317.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.