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Finding the Fourth Proportional to 486,039.60, 678,880.80 and 486,039.60

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Solution

The fourth proportional to 486,039.60, 678,880.80 and 486,039.60 is: 678,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,039.60 : 678,880.80 = 486,039.60 : x
  2. Step 2: Convert to fraction form
    486,039.60/678,880.80 = 486,039.60/x
  3. Step 3: Cross multiply
    486,039.60x = 678,880.80 × 486,039.60
  4. Step 4: Simplify right side
    486,039.60x = 329,962,952,479.68
  5. Step 5: Solve for x
    x = 329,962,952,479.68/486,039.60
  6. Step 6: Final answer
    x = 678,880.80

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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.