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Finding the Fourth Proportional to 1,052.05, 1,578.25 and 321.46

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Solution

The fourth proportional to 1,052.05, 1,578.25 and 321.46 is: 482.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.05 : 1,578.25 = 321.46 : x
  2. Step 2: Convert to fraction form
    1,052.05/1,578.25 = 321.46/x
  3. Step 3: Cross multiply
    1,052.05x = 1,578.25 × 321.46
  4. Step 4: Simplify right side
    1,052.05x = 507,336.35
  5. Step 5: Solve for x
    x = 507,336.35/1,052.05
  6. Step 6: Final answer
    x = 482.24

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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.