Home / 1,051.20-1,578.60-1,018.80

Finding the Fourth Proportional to 1,051.20, 1,578.60 and 1,018.80

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Solution

The fourth proportional to 1,051.20, 1,578.60 and 1,018.80 is: 1,529.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.20 : 1,578.60 = 1,018.80 : x
  2. Step 2: Convert to fraction form
    1,051.20/1,578.60 = 1,018.80/x
  3. Step 3: Cross multiply
    1,051.20x = 1,578.60 × 1,018.80
  4. Step 4: Simplify right side
    1,051.20x = 1,608,277.68
  5. Step 5: Solve for x
    x = 1,608,277.68/1,051.20
  6. Step 6: Final answer
    x = 1,529.94

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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.