Home / 1,627.12-2,243.40-1,331.72

Finding the Fourth Proportional to 1,627.12, 2,243.40 and 1,331.72

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Solution

The fourth proportional to 1,627.12, 2,243.40 and 1,331.72 is: 1,836.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.12 : 2,243.40 = 1,331.72 : x
  2. Step 2: Convert to fraction form
    1,627.12/2,243.40 = 1,331.72/x
  3. Step 3: Cross multiply
    1,627.12x = 2,243.40 × 1,331.72
  4. Step 4: Simplify right side
    1,627.12x = 2,987,580.65
  5. Step 5: Solve for x
    x = 2,987,580.65/1,627.12
  6. Step 6: Final answer
    x = 1,836.12

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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.