Home / 1,405.44-1,938.20-1,111.41

Finding the Fourth Proportional to 1,405.44, 1,938.20 and 1,111.41

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Solution

The fourth proportional to 1,405.44, 1,938.20 and 1,111.41 is: 1,532.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.44 : 1,938.20 = 1,111.41 : x
  2. Step 2: Convert to fraction form
    1,405.44/1,938.20 = 1,111.41/x
  3. Step 3: Cross multiply
    1,405.44x = 1,938.20 × 1,111.41
  4. Step 4: Simplify right side
    1,405.44x = 2,154,129.30
  5. Step 5: Solve for x
    x = 2,154,129.30/1,405.44
  6. Step 6: Final answer
    x = 1,532.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.