Home / 3,218.28-4,440.57-1,820.76

Finding the Fourth Proportional to 3,218.28, 4,440.57 and 1,820.76

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Solution

The fourth proportional to 3,218.28, 4,440.57 and 1,820.76 is: 2,512.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.28 : 4,440.57 = 1,820.76 : x
  2. Step 2: Convert to fraction form
    3,218.28/4,440.57 = 1,820.76/x
  3. Step 3: Cross multiply
    3,218.28x = 4,440.57 × 1,820.76
  4. Step 4: Simplify right side
    3,218.28x = 8,085,212.23
  5. Step 5: Solve for x
    x = 8,085,212.23/3,218.28
  6. Step 6: Final answer
    x = 2,512.28

Related Problems

Find fourth proportional to 1,609.14, 2,220.29 and 910.38
Half scale
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Double scale
Find fourth proportional to 3,219.28, 4,441.95 and 1,821.76
Similar ratio
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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.