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Finding the Fourth Proportional to 666,116.96, 919,218.66 and 379,729.31

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Solution

The fourth proportional to 666,116.96, 919,218.66 and 379,729.31 is: 524,013.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,116.96 : 919,218.66 = 379,729.31 : x
  2. Step 2: Convert to fraction form
    666,116.96/919,218.66 = 379,729.31/x
  3. Step 3: Cross multiply
    666,116.96x = 919,218.66 × 379,729.31
  4. Step 4: Simplify right side
    666,116.96x = 349,054,267,500.93
  5. Step 5: Solve for x
    x = 349,054,267,500.93/666,116.96
  6. Step 6: Final answer
    x = 524,013.48

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1.5x scale

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.