Home / 784,938.80-1,177,408.20-311,380.40

Finding the Fourth Proportional to 784,938.80, 1,177,408.20 and 311,380.40

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Solution

The fourth proportional to 784,938.80, 1,177,408.20 and 311,380.40 is: 467,070.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    784,938.80 : 1,177,408.20 = 311,380.40 : x
  2. Step 2: Convert to fraction form
    784,938.80/1,177,408.20 = 311,380.40/x
  3. Step 3: Cross multiply
    784,938.80x = 1,177,408.20 × 311,380.40
  4. Step 4: Simplify right side
    784,938.80x = 366,621,836,279.28
  5. Step 5: Solve for x
    x = 366,621,836,279.28/784,938.80
  6. Step 6: Final answer
    x = 467,070.60

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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.