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Finding the Fourth Proportional to 1,599.90, 2,399.76 and 445.65

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Solution

The fourth proportional to 1,599.90, 2,399.76 and 445.65 is: 668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,599.90 : 2,399.76 = 445.65 : x
  2. Step 2: Convert to fraction form
    1,599.90/2,399.76 = 445.65/x
  3. Step 3: Cross multiply
    1,599.90x = 2,399.76 × 445.65
  4. Step 4: Simplify right side
    1,599.90x = 1,069,453.04
  5. Step 5: Solve for x
    x = 1,069,453.04/1,599.90
  6. Step 6: Final answer
    x = 668.45

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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.