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Finding the Fourth Proportional to 706,761, 975,330.18 and 388,809

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Solution

The fourth proportional to 706,761, 975,330.18 and 388,809 is: 536,556.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,761 : 975,330.18 = 388,809 : x
  2. Step 2: Convert to fraction form
    706,761/975,330.18 = 388,809/x
  3. Step 3: Cross multiply
    706,761x = 975,330.18 × 388,809
  4. Step 4: Simplify right side
    706,761x = 379,217,151,955.62
  5. Step 5: Solve for x
    x = 379,217,151,955.62/706,761
  6. Step 6: Final answer
    x = 536,556.42

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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.