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Finding the Fourth Proportional to 525,905.40, 788,339.70 and 259,447.80

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Solution

The fourth proportional to 525,905.40, 788,339.70 and 259,447.80 is: 388,915.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,905.40 : 788,339.70 = 259,447.80 : x
  2. Step 2: Convert to fraction form
    525,905.40/788,339.70 = 259,447.80/x
  3. Step 3: Cross multiply
    525,905.40x = 788,339.70 × 259,447.80
  4. Step 4: Simplify right side
    525,905.40x = 204,533,000,817.66
  5. Step 5: Solve for x
    x = 204,533,000,817.66/525,905.40
  6. Step 6: Final answer
    x = 388,915.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.