Home / 1,645.40-2,270.70-899.43

Finding the Fourth Proportional to 1,645.40, 2,270.70 and 899.43

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Solution

The fourth proportional to 1,645.40, 2,270.70 and 899.43 is: 1,241.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.40 : 2,270.70 = 899.43 : x
  2. Step 2: Convert to fraction form
    1,645.40/2,270.70 = 899.43/x
  3. Step 3: Cross multiply
    1,645.40x = 2,270.70 × 899.43
  4. Step 4: Simplify right side
    1,645.40x = 2,042,335.70
  5. Step 5: Solve for x
    x = 2,042,335.70/1,645.40
  6. Step 6: Final answer
    x = 1,241.24

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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.