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Finding the Fourth Proportional to 1,485.71, 2,228.13 and 445.67

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Solution

The fourth proportional to 1,485.71, 2,228.13 and 445.67 is: 668.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.71 : 2,228.13 = 445.67 : x
  2. Step 2: Convert to fraction form
    1,485.71/2,228.13 = 445.67/x
  3. Step 3: Cross multiply
    1,485.71x = 2,228.13 × 445.67
  4. Step 4: Simplify right side
    1,485.71x = 993,010.70
  5. Step 5: Solve for x
    x = 993,010.70/1,485.71
  6. Step 6: Final answer
    x = 668.37

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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.