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Finding the Fourth Proportional to 311,939.60, 468,128.10 and 199,892.30

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Solution

The fourth proportional to 311,939.60, 468,128.10 and 199,892.30 is: 299,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,939.60 : 468,128.10 = 199,892.30 : x
  2. Step 2: Convert to fraction form
    311,939.60/468,128.10 = 199,892.30/x
  3. Step 3: Cross multiply
    311,939.60x = 468,128.10 × 199,892.30
  4. Step 4: Simplify right side
    311,939.60x = 93,575,202,603.63
  5. Step 5: Solve for x
    x = 93,575,202,603.63/311,939.60
  6. Step 6: Final answer
    x = 299,978.59

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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.