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Finding the Fourth Proportional to 1,048.99, 1,573.68 and 399.67

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Solution

The fourth proportional to 1,048.99, 1,573.68 and 399.67 is: 599.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.99 : 1,573.68 = 399.67 : x
  2. Step 2: Convert to fraction form
    1,048.99/1,573.68 = 399.67/x
  3. Step 3: Cross multiply
    1,048.99x = 1,573.68 × 399.67
  4. Step 4: Simplify right side
    1,048.99x = 628,952.69
  5. Step 5: Solve for x
    x = 628,952.69/1,048.99
  6. Step 6: Final answer
    x = 599.58

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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.