Home / 1,485.77-2,231.21-1,319.37

Finding the Fourth Proportional to 1,485.77, 2,231.21 and 1,319.37

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Solution

The fourth proportional to 1,485.77, 2,231.21 and 1,319.37 is: 1,981.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.77 : 2,231.21 = 1,319.37 : x
  2. Step 2: Convert to fraction form
    1,485.77/2,231.21 = 1,319.37/x
  3. Step 3: Cross multiply
    1,485.77x = 2,231.21 × 1,319.37
  4. Step 4: Simplify right side
    1,485.77x = 2,943,784.94
  5. Step 5: Solve for x
    x = 2,943,784.94/1,485.77
  6. Step 6: Final answer
    x = 1,981.32

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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.