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Finding the Fourth Proportional to 490,999.40, 734,943.90 and 385,245.80

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Solution

The fourth proportional to 490,999.40, 734,943.90 and 385,245.80 is: 576,648.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,999.40 : 734,943.90 = 385,245.80 : x
  2. Step 2: Convert to fraction form
    490,999.40/734,943.90 = 385,245.80/x
  3. Step 3: Cross multiply
    490,999.40x = 734,943.90 × 385,245.80
  4. Step 4: Simplify right side
    490,999.40x = 283,134,050,710.62
  5. Step 5: Solve for x
    x = 283,134,050,710.62/490,999.40
  6. Step 6: Final answer
    x = 576,648.47

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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.