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Finding the Fourth Proportional to 289,336.53, 399,191.70 and 187,440.55

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Solution

The fourth proportional to 289,336.53, 399,191.70 and 187,440.55 is: 258,607.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,336.53 : 399,191.70 = 187,440.55 : x
  2. Step 2: Convert to fraction form
    289,336.53/399,191.70 = 187,440.55/x
  3. Step 3: Cross multiply
    289,336.53x = 399,191.70 × 187,440.55
  4. Step 4: Simplify right side
    289,336.53x = 74,824,711,803.44
  5. Step 5: Solve for x
    x = 74,824,711,803.44/289,336.53
  6. Step 6: Final answer
    x = 258,607.90

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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.