Home / 1,240.24-1,869.66-1,049.20

Finding the Fourth Proportional to 1,240.24, 1,869.66 and 1,049.20

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Solution

The fourth proportional to 1,240.24, 1,869.66 and 1,049.20 is: 1,581.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.24 : 1,869.66 = 1,049.20 : x
  2. Step 2: Convert to fraction form
    1,240.24/1,869.66 = 1,049.20/x
  3. Step 3: Cross multiply
    1,240.24x = 1,869.66 × 1,049.20
  4. Step 4: Simplify right side
    1,240.24x = 1,961,647.27
  5. Step 5: Solve for x
    x = 1,961,647.27/1,240.24
  6. Step 6: Final answer
    x = 1,581.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.