Home / 1,286,912.40-1,930,368.60-340,378.80

Finding the Fourth Proportional to 1,286,912.40, 1,930,368.60 and 340,378.80

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Solution

The fourth proportional to 1,286,912.40, 1,930,368.60 and 340,378.80 is: 510,568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,912.40 : 1,930,368.60 = 340,378.80 : x
  2. Step 2: Convert to fraction form
    1,286,912.40/1,930,368.60 = 340,378.80/x
  3. Step 3: Cross multiply
    1,286,912.40x = 1,930,368.60 × 340,378.80
  4. Step 4: Simplify right side
    1,286,912.40x = 657,056,547,625.68
  5. Step 5: Solve for x
    x = 657,056,547,625.68/1,286,912.40
  6. Step 6: Final answer
    x = 510,568.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.