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Finding the Fourth Proportional to 353,185.92, 530,111.84 and 128,763.28

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Solution

The fourth proportional to 353,185.92, 530,111.84 and 128,763.28 is: 193,266.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,185.92 : 530,111.84 = 128,763.28 : x
  2. Step 2: Convert to fraction form
    353,185.92/530,111.84 = 128,763.28/x
  3. Step 3: Cross multiply
    353,185.92x = 530,111.84 × 128,763.28
  4. Step 4: Simplify right side
    353,185.92x = 68,258,939,285.24
  5. Step 5: Solve for x
    x = 68,258,939,285.24/353,185.92
  6. Step 6: Final answer
    x = 193,266.31

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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.