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Finding the Fourth Proportional to 289,349.01, 399,406.45 and 235,540.61

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Solution

The fourth proportional to 289,349.01, 399,406.45 and 235,540.61 is: 325,131.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,349.01 : 399,406.45 = 235,540.61 : x
  2. Step 2: Convert to fraction form
    289,349.01/399,406.45 = 235,540.61/x
  3. Step 3: Cross multiply
    289,349.01x = 399,406.45 × 235,540.61
  4. Step 4: Simplify right side
    289,349.01x = 94,076,438,870.93
  5. Step 5: Solve for x
    x = 94,076,438,870.93/289,349.01
  6. Step 6: Final answer
    x = 325,131.37

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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.