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Finding the Fourth Proportional to 496,891.40, 685,655.70 and 279,098.60

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Solution

The fourth proportional to 496,891.40, 685,655.70 and 279,098.60 is: 385,125.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,891.40 : 685,655.70 = 279,098.60 : x
  2. Step 2: Convert to fraction form
    496,891.40/685,655.70 = 279,098.60/x
  3. Step 3: Cross multiply
    496,891.40x = 685,655.70 × 279,098.60
  4. Step 4: Simplify right side
    496,891.40x = 191,365,545,952.02
  5. Step 5: Solve for x
    x = 191,365,545,952.02/496,891.40
  6. Step 6: Final answer
    x = 385,125.49

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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.