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Finding the Fourth Proportional to 291,781.80, 437,672.70 and 186,719.40

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Solution

The fourth proportional to 291,781.80, 437,672.70 and 186,719.40 is: 280,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,781.80 : 437,672.70 = 186,719.40 : x
  2. Step 2: Convert to fraction form
    291,781.80/437,672.70 = 186,719.40/x
  3. Step 3: Cross multiply
    291,781.80x = 437,672.70 × 186,719.40
  4. Step 4: Simplify right side
    291,781.80x = 81,721,983,940.38
  5. Step 5: Solve for x
    x = 81,721,983,940.38/291,781.80
  6. Step 6: Final answer
    x = 280,079.10

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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.