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Finding the Fourth Proportional to 1,406.75, 2,110.80 and 541.67

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Solution

The fourth proportional to 1,406.75, 2,110.80 and 541.67 is: 812.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.75 : 2,110.80 = 541.67 : x
  2. Step 2: Convert to fraction form
    1,406.75/2,110.80 = 541.67/x
  3. Step 3: Cross multiply
    1,406.75x = 2,110.80 × 541.67
  4. Step 4: Simplify right side
    1,406.75x = 1,143,357.04
  5. Step 5: Solve for x
    x = 1,143,357.04/1,406.75
  6. Step 6: Final answer
    x = 812.76

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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.