Home / 920,137.20-1,380,205.80-289,114.80

Finding the Fourth Proportional to 920,137.20, 1,380,205.80 and 289,114.80

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Solution

The fourth proportional to 920,137.20, 1,380,205.80 and 289,114.80 is: 433,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,137.20 : 1,380,205.80 = 289,114.80 : x
  2. Step 2: Convert to fraction form
    920,137.20/1,380,205.80 = 289,114.80/x
  3. Step 3: Cross multiply
    920,137.20x = 1,380,205.80 × 289,114.80
  4. Step 4: Simplify right side
    920,137.20x = 399,037,923,825.84
  5. Step 5: Solve for x
    x = 399,037,923,825.84/920,137.20
  6. Step 6: Final answer
    x = 433,672.20

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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.