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Finding the Fourth Proportional to 490,829.60, 687,628 and 490,829.60

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Solution

The fourth proportional to 490,829.60, 687,628 and 490,829.60 is: 687,628

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,829.60 : 687,628 = 490,829.60 : x
  2. Step 2: Convert to fraction form
    490,829.60/687,628 = 490,829.60/x
  3. Step 3: Cross multiply
    490,829.60x = 687,628 × 490,829.60
  4. Step 4: Simplify right side
    490,829.60x = 337,508,176,188.80
  5. Step 5: Solve for x
    x = 337,508,176,188.80/490,829.60
  6. Step 6: Final answer
    x = 687,628

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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.