Home / 1,427.11-2,140.42-386.98

Finding the Fourth Proportional to 1,427.11, 2,140.42 and 386.98

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Solution

The fourth proportional to 1,427.11, 2,140.42 and 386.98 is: 580.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.11 : 2,140.42 = 386.98 : x
  2. Step 2: Convert to fraction form
    1,427.11/2,140.42 = 386.98/x
  3. Step 3: Cross multiply
    1,427.11x = 2,140.42 × 386.98
  4. Step 4: Simplify right side
    1,427.11x = 828,288.06
  5. Step 5: Solve for x
    x = 828,288.06/1,427.11
  6. Step 6: Final answer
    x = 580.40

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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.