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Finding the Fourth Proportional to 1,015.93, 1,523.23 and 399.69

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Solution

The fourth proportional to 1,015.93, 1,523.23 and 399.69 is: 599.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.93 : 1,523.23 = 399.69 : x
  2. Step 2: Convert to fraction form
    1,015.93/1,523.23 = 399.69/x
  3. Step 3: Cross multiply
    1,015.93x = 1,523.23 × 399.69
  4. Step 4: Simplify right side
    1,015.93x = 608,819.80
  5. Step 5: Solve for x
    x = 608,819.80/1,015.93
  6. Step 6: Final answer
    x = 599.27

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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.