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Finding the Fourth Proportional to 490,679.60, 736,019.40 and 266,147.60

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Solution

The fourth proportional to 490,679.60, 736,019.40 and 266,147.60 is: 399,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,679.60 : 736,019.40 = 266,147.60 : x
  2. Step 2: Convert to fraction form
    490,679.60/736,019.40 = 266,147.60/x
  3. Step 3: Cross multiply
    490,679.60x = 736,019.40 × 266,147.60
  4. Step 4: Simplify right side
    490,679.60x = 195,889,796,863.44
  5. Step 5: Solve for x
    x = 195,889,796,863.44/490,679.60
  6. Step 6: Final answer
    x = 399,221.40

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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.