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Finding the Fourth Proportional to 371,639.91, 512,571.33 and 328,665.36

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Solution

The fourth proportional to 371,639.91, 512,571.33 and 328,665.36 is: 453,300.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,639.91 : 512,571.33 = 328,665.36 : x
  2. Step 2: Convert to fraction form
    371,639.91/512,571.33 = 328,665.36/x
  3. Step 3: Cross multiply
    371,639.91x = 512,571.33 × 328,665.36
  4. Step 4: Simplify right side
    371,639.91x = 168,464,440,700.13
  5. Step 5: Solve for x
    x = 168,464,440,700.13/371,639.91
  6. Step 6: Final answer
    x = 453,300.19

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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.