Home / 2,173.04-2,998.79-1,288.89

Finding the Fourth Proportional to 2,173.04, 2,998.79 and 1,288.89

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Solution

The fourth proportional to 2,173.04, 2,998.79 and 1,288.89 is: 1,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.04 : 2,998.79 = 1,288.89 : x
  2. Step 2: Convert to fraction form
    2,173.04/2,998.79 = 1,288.89/x
  3. Step 3: Cross multiply
    2,173.04x = 2,998.79 × 1,288.89
  4. Step 4: Simplify right side
    2,173.04x = 3,865,104.00
  5. Step 5: Solve for x
    x = 3,865,104.00/2,173.04
  6. Step 6: Final answer
    x = 1,778.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.