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Finding the Fourth Proportional to 395,150.40, 545,160.78 and 251,877.60

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Solution

The fourth proportional to 395,150.40, 545,160.78 and 251,877.60 is: 347,497.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,150.40 : 545,160.78 = 251,877.60 : x
  2. Step 2: Convert to fraction form
    395,150.40/545,160.78 = 251,877.60/x
  3. Step 3: Cross multiply
    395,150.40x = 545,160.78 × 251,877.60
  4. Step 4: Simplify right side
    395,150.40x = 137,313,788,880.53
  5. Step 5: Solve for x
    x = 137,313,788,880.53/395,150.40
  6. Step 6: Final answer
    x = 347,497.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.