Home / 1,431.03-2,146.26-390.95

Finding the Fourth Proportional to 1,431.03, 2,146.26 and 390.95

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Solution

The fourth proportional to 1,431.03, 2,146.26 and 390.95 is: 586.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.03 : 2,146.26 = 390.95 : x
  2. Step 2: Convert to fraction form
    1,431.03/2,146.26 = 390.95/x
  3. Step 3: Cross multiply
    1,431.03x = 2,146.26 × 390.95
  4. Step 4: Simplify right side
    1,431.03x = 839,067.66
  5. Step 5: Solve for x
    x = 839,067.66/1,431.03
  6. Step 6: Final answer
    x = 586.34

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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.