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Finding the Fourth Proportional to 353,792.49, 530,215.80 and 128,941.56

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Solution

The fourth proportional to 353,792.49, 530,215.80 and 128,941.56 is: 193,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,792.49 : 530,215.80 = 128,941.56 : x
  2. Step 2: Convert to fraction form
    353,792.49/530,215.80 = 128,941.56/x
  3. Step 3: Cross multiply
    353,792.49x = 530,215.80 × 128,941.56
  4. Step 4: Simplify right side
    353,792.49x = 68,366,852,388.65
  5. Step 5: Solve for x
    x = 68,366,852,388.65/353,792.49
  6. Step 6: Final answer
    x = 193,239.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.