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Finding the Fourth Proportional to 919,700.19, 1,388,188.44 and 919,700.19

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Solution

The fourth proportional to 919,700.19, 1,388,188.44 and 919,700.19 is: 1,388,188.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,700.19 : 1,388,188.44 = 919,700.19 : x
  2. Step 2: Convert to fraction form
    919,700.19/1,388,188.44 = 919,700.19/x
  3. Step 3: Cross multiply
    919,700.19x = 1,388,188.44 × 919,700.19
  4. Step 4: Simplify right side
    919,700.19x = 1,276,717,172,023.80
  5. Step 5: Solve for x
    x = 1,276,717,172,023.80/919,700.19
  6. Step 6: Final answer
    x = 1,388,188.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.