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Finding the Fourth Proportional to 1,029.58, 1,544.58 and 380.20

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Solution

The fourth proportional to 1,029.58, 1,544.58 and 380.20 is: 570.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.58 : 1,544.58 = 380.20 : x
  2. Step 2: Convert to fraction form
    1,029.58/1,544.58 = 380.20/x
  3. Step 3: Cross multiply
    1,029.58x = 1,544.58 × 380.20
  4. Step 4: Simplify right side
    1,029.58x = 587,249.32
  5. Step 5: Solve for x
    x = 587,249.32/1,029.58
  6. Step 6: Final answer
    x = 570.38

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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.