Home / 1,620.34-2,236.27-912.45

Finding the Fourth Proportional to 1,620.34, 2,236.27 and 912.45

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Solution

The fourth proportional to 1,620.34, 2,236.27 and 912.45 is: 1,259.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.34 : 2,236.27 = 912.45 : x
  2. Step 2: Convert to fraction form
    1,620.34/2,236.27 = 912.45/x
  3. Step 3: Cross multiply
    1,620.34x = 2,236.27 × 912.45
  4. Step 4: Simplify right side
    1,620.34x = 2,040,484.56
  5. Step 5: Solve for x
    x = 2,040,484.56/1,620.34
  6. Step 6: Final answer
    x = 1,259.29

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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.