Home / 692,938.80-1,039,408.20-394,340.40

Finding the Fourth Proportional to 692,938.80, 1,039,408.20 and 394,340.40

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Solution

The fourth proportional to 692,938.80, 1,039,408.20 and 394,340.40 is: 591,510.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,938.80 : 1,039,408.20 = 394,340.40 : x
  2. Step 2: Convert to fraction form
    692,938.80/1,039,408.20 = 394,340.40/x
  3. Step 3: Cross multiply
    692,938.80x = 1,039,408.20 × 394,340.40
  4. Step 4: Simplify right side
    692,938.80x = 409,880,645,351.28
  5. Step 5: Solve for x
    x = 409,880,645,351.28/692,938.80
  6. Step 6: Final answer
    x = 591,510.60

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Double scale
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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.