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Finding the Fourth Proportional to 289,985.92, 400,969.92 and 252,661.12

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Solution

The fourth proportional to 289,985.92, 400,969.92 and 252,661.12 is: 349,360.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,985.92 : 400,969.92 = 252,661.12 : x
  2. Step 2: Convert to fraction form
    289,985.92/400,969.92 = 252,661.12/x
  3. Step 3: Cross multiply
    289,985.92x = 400,969.92 × 252,661.12
  4. Step 4: Simplify right side
    289,985.92x = 101,309,509,073.51
  5. Step 5: Solve for x
    x = 101,309,509,073.51/289,985.92
  6. Step 6: Final answer
    x = 349,360.10

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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.