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Finding the Fourth Proportional to 919,695.13, 1,388,181.65 and 919,695.13

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Solution

The fourth proportional to 919,695.13, 1,388,181.65 and 919,695.13 is: 1,388,181.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,695.13 : 1,388,181.65 = 919,695.13 : x
  2. Step 2: Convert to fraction form
    919,695.13/1,388,181.65 = 919,695.13/x
  3. Step 3: Cross multiply
    919,695.13x = 1,388,181.65 × 919,695.13
  4. Step 4: Simplify right side
    919,695.13x = 1,276,703,898,461.89
  5. Step 5: Solve for x
    x = 1,276,703,898,461.89/919,695.13
  6. Step 6: Final answer
    x = 1,388,181.65

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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.