Home / 1,628.40-2,245.56-965.28

Finding the Fourth Proportional to 1,628.40, 2,245.56 and 965.28

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Solution

The fourth proportional to 1,628.40, 2,245.56 and 965.28 is: 1,331.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.40 : 2,245.56 = 965.28 : x
  2. Step 2: Convert to fraction form
    1,628.40/2,245.56 = 965.28/x
  3. Step 3: Cross multiply
    1,628.40x = 2,245.56 × 965.28
  4. Step 4: Simplify right side
    1,628.40x = 2,167,594.16
  5. Step 5: Solve for x
    x = 2,167,594.16/1,628.40
  6. Step 6: Final answer
    x = 1,331.12

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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.