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Finding the Fourth Proportional to 2,007.99, 3,012.80 and 912.87

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Solution

The fourth proportional to 2,007.99, 3,012.80 and 912.87 is: 1,369.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,007.99 : 3,012.80 = 912.87 : x
  2. Step 2: Convert to fraction form
    2,007.99/3,012.80 = 912.87/x
  3. Step 3: Cross multiply
    2,007.99x = 3,012.80 × 912.87
  4. Step 4: Simplify right side
    2,007.99x = 2,750,290.17
  5. Step 5: Solve for x
    x = 2,750,290.17/2,007.99
  6. Step 6: Final answer
    x = 1,369.67

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1.5x scale

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.