Home / 1,409.23-2,114.12-679.69

Finding the Fourth Proportional to 1,409.23, 2,114.12 and 679.69

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Solution

The fourth proportional to 1,409.23, 2,114.12 and 679.69 is: 1,019.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.23 : 2,114.12 = 679.69 : x
  2. Step 2: Convert to fraction form
    1,409.23/2,114.12 = 679.69/x
  3. Step 3: Cross multiply
    1,409.23x = 2,114.12 × 679.69
  4. Step 4: Simplify right side
    1,409.23x = 1,436,946.22
  5. Step 5: Solve for x
    x = 1,436,946.22/1,409.23
  6. Step 6: Final answer
    x = 1,019.67

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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.