Home / 1,287.15-1,930.41-900.60

Finding the Fourth Proportional to 1,287.15, 1,930.41 and 900.60

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Solution

The fourth proportional to 1,287.15, 1,930.41 and 900.60 is: 1,350.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.15 : 1,930.41 = 900.60 : x
  2. Step 2: Convert to fraction form
    1,287.15/1,930.41 = 900.60/x
  3. Step 3: Cross multiply
    1,287.15x = 1,930.41 × 900.60
  4. Step 4: Simplify right side
    1,287.15x = 1,738,527.25
  5. Step 5: Solve for x
    x = 1,738,527.25/1,287.15
  6. Step 6: Final answer
    x = 1,350.68

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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.