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Finding the Fourth Proportional to 490,099.80, 687,539.40 and 490,099.80

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Solution

The fourth proportional to 490,099.80, 687,539.40 and 490,099.80 is: 687,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,099.80 : 687,539.40 = 490,099.80 : x
  2. Step 2: Convert to fraction form
    490,099.80/687,539.40 = 490,099.80/x
  3. Step 3: Cross multiply
    490,099.80x = 687,539.40 × 490,099.80
  4. Step 4: Simplify right side
    490,099.80x = 336,962,922,432.12
  5. Step 5: Solve for x
    x = 336,962,922,432.12/490,099.80
  6. Step 6: Final answer
    x = 687,539.40

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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.