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Finding the Fourth Proportional to 393,160.50, 542,573.01 and 223,401.78

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Solution

The fourth proportional to 393,160.50, 542,573.01 and 223,401.78 is: 308,301.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,160.50 : 542,573.01 = 223,401.78 : x
  2. Step 2: Convert to fraction form
    393,160.50/542,573.01 = 223,401.78/x
  3. Step 3: Cross multiply
    393,160.50x = 542,573.01 × 223,401.78
  4. Step 4: Simplify right side
    393,160.50x = 121,211,776,213.96
  5. Step 5: Solve for x
    x = 121,211,776,213.96/393,160.50
  6. Step 6: Final answer
    x = 308,301.00

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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.