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Finding the Fourth Proportional to 525,782.60, 788,673.90 and 399,811.40

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Solution

The fourth proportional to 525,782.60, 788,673.90 and 399,811.40 is: 599,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,782.60 : 788,673.90 = 399,811.40 : x
  2. Step 2: Convert to fraction form
    525,782.60/788,673.90 = 399,811.40/x
  3. Step 3: Cross multiply
    525,782.60x = 788,673.90 × 399,811.40
  4. Step 4: Simplify right side
    525,782.60x = 315,320,816,102.46
  5. Step 5: Solve for x
    x = 315,320,816,102.46/525,782.60
  6. Step 6: Final answer
    x = 599,717.10

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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.