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Finding the Fourth Proportional to 490,830.60, 687,629.40 and 490,830.60

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Solution

The fourth proportional to 490,830.60, 687,629.40 and 490,830.60 is: 687,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,830.60 : 687,629.40 = 490,830.60 : x
  2. Step 2: Convert to fraction form
    490,830.60/687,629.40 = 490,830.60/x
  3. Step 3: Cross multiply
    490,830.60x = 687,629.40 × 490,830.60
  4. Step 4: Simplify right side
    490,830.60x = 337,509,550,979.64
  5. Step 5: Solve for x
    x = 337,509,550,979.64/490,830.60
  6. Step 6: Final answer
    x = 687,629.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.