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Finding the Fourth Proportional to 311,907.20, 467,860.80 and 171,939.20

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Solution

The fourth proportional to 311,907.20, 467,860.80 and 171,939.20 is: 257,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,907.20 : 467,860.80 = 171,939.20 : x
  2. Step 2: Convert to fraction form
    311,907.20/467,860.80 = 171,939.20/x
  3. Step 3: Cross multiply
    311,907.20x = 467,860.80 × 171,939.20
  4. Step 4: Simplify right side
    311,907.20x = 80,443,611,663.36
  5. Step 5: Solve for x
    x = 80,443,611,663.36/311,907.20
  6. Step 6: Final answer
    x = 257,908.80

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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.