Home / 1,427.05-2,139.35-605.91

Finding the Fourth Proportional to 1,427.05, 2,139.35 and 605.91

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Solution

The fourth proportional to 1,427.05, 2,139.35 and 605.91 is: 908.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.05 : 2,139.35 = 605.91 : x
  2. Step 2: Convert to fraction form
    1,427.05/2,139.35 = 605.91/x
  3. Step 3: Cross multiply
    1,427.05x = 2,139.35 × 605.91
  4. Step 4: Simplify right side
    1,427.05x = 1,296,258.55
  5. Step 5: Solve for x
    x = 1,296,258.55/1,427.05
  6. Step 6: Final answer
    x = 908.35

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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.