Home / 1,645.20-2,270.37-899.14

Finding the Fourth Proportional to 1,645.20, 2,270.37 and 899.14

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Solution

The fourth proportional to 1,645.20, 2,270.37 and 899.14 is: 1,240.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.20 : 2,270.37 = 899.14 : x
  2. Step 2: Convert to fraction form
    1,645.20/2,270.37 = 899.14/x
  3. Step 3: Cross multiply
    1,645.20x = 2,270.37 × 899.14
  4. Step 4: Simplify right side
    1,645.20x = 2,041,380.48
  5. Step 5: Solve for x
    x = 2,041,380.48/1,645.20
  6. Step 6: Final answer
    x = 1,240.81

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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.