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Finding the Fourth Proportional to 2,190.44, 3,285.42 and 957.20

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Solution

The fourth proportional to 2,190.44, 3,285.42 and 957.20 is: 1,435.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.44 : 3,285.42 = 957.20 : x
  2. Step 2: Convert to fraction form
    2,190.44/3,285.42 = 957.20/x
  3. Step 3: Cross multiply
    2,190.44x = 3,285.42 × 957.20
  4. Step 4: Simplify right side
    2,190.44x = 3,144,804.02
  5. Step 5: Solve for x
    x = 3,144,804.02/2,190.44
  6. Step 6: Final answer
    x = 1,435.70

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1.5x scale

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.