Home / 1,989.36-2,984.16-1,124.40

Finding the Fourth Proportional to 1,989.36, 2,984.16 and 1,124.40

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Solution

The fourth proportional to 1,989.36, 2,984.16 and 1,124.40 is: 1,686.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.36 : 2,984.16 = 1,124.40 : x
  2. Step 2: Convert to fraction form
    1,989.36/2,984.16 = 1,124.40/x
  3. Step 3: Cross multiply
    1,989.36x = 2,984.16 × 1,124.40
  4. Step 4: Simplify right side
    1,989.36x = 3,355,389.50
  5. Step 5: Solve for x
    x = 3,355,389.50/1,989.36
  6. Step 6: Final answer
    x = 1,686.67

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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.