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Finding the Fourth Proportional to 409,312.97, 560,760.81 and 393,972.35

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Solution

The fourth proportional to 409,312.97, 560,760.81 and 393,972.35 is: 539,744.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,312.97 : 560,760.81 = 393,972.35 : x
  2. Step 2: Convert to fraction form
    409,312.97/560,760.81 = 393,972.35/x
  3. Step 3: Cross multiply
    409,312.97x = 560,760.81 × 393,972.35
  4. Step 4: Simplify right side
    409,312.97x = 220,924,252,133.74
  5. Step 5: Solve for x
    x = 220,924,252,133.74/409,312.97
  6. Step 6: Final answer
    x = 539,744.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.