Home / 1,631.44-2,249.40-1,420.84

Finding the Fourth Proportional to 1,631.44, 2,249.40 and 1,420.84

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Solution

The fourth proportional to 1,631.44, 2,249.40 and 1,420.84 is: 1,959.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.44 : 2,249.40 = 1,420.84 : x
  2. Step 2: Convert to fraction form
    1,631.44/2,249.40 = 1,420.84/x
  3. Step 3: Cross multiply
    1,631.44x = 2,249.40 × 1,420.84
  4. Step 4: Simplify right side
    1,631.44x = 3,196,037.50
  5. Step 5: Solve for x
    x = 3,196,037.50/1,631.44
  6. Step 6: Final answer
    x = 1,959.03

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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.