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Finding the Fourth Proportional to 328,563.36, 453,417.12 and 177,660

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Solution

The fourth proportional to 328,563.36, 453,417.12 and 177,660 is: 245,170.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,563.36 : 453,417.12 = 177,660 : x
  2. Step 2: Convert to fraction form
    328,563.36/453,417.12 = 177,660/x
  3. Step 3: Cross multiply
    328,563.36x = 453,417.12 × 177,660
  4. Step 4: Simplify right side
    328,563.36x = 80,554,085,539.20
  5. Step 5: Solve for x
    x = 80,554,085,539.20/328,563.36
  6. Step 6: Final answer
    x = 245,170.63

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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.