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Finding the Fourth Proportional to 311,939.70, 467,909.55 and 238,211.70

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Solution

The fourth proportional to 311,939.70, 467,909.55 and 238,211.70 is: 357,317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,939.70 : 467,909.55 = 238,211.70 : x
  2. Step 2: Convert to fraction form
    311,939.70/467,909.55 = 238,211.70/x
  3. Step 3: Cross multiply
    311,939.70x = 467,909.55 × 238,211.70
  4. Step 4: Simplify right side
    311,939.70x = 111,461,529,351.74
  5. Step 5: Solve for x
    x = 111,461,529,351.74/311,939.70
  6. Step 6: Final answer
    x = 357,317.55

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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.