Home / 1,508.21-2,077.61-1,311.38

Finding the Fourth Proportional to 1,508.21, 2,077.61 and 1,311.38

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Solution

The fourth proportional to 1,508.21, 2,077.61 and 1,311.38 is: 1,806.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.21 : 2,077.61 = 1,311.38 : x
  2. Step 2: Convert to fraction form
    1,508.21/2,077.61 = 1,311.38/x
  3. Step 3: Cross multiply
    1,508.21x = 2,077.61 × 1,311.38
  4. Step 4: Simplify right side
    1,508.21x = 2,724,519.26
  5. Step 5: Solve for x
    x = 2,724,519.26/1,508.21
  6. Step 6: Final answer
    x = 1,806.46

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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.