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Finding the Fourth Proportional to 288,389.97, 398,174.94 and 186,661.67

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Solution

The fourth proportional to 288,389.97, 398,174.94 and 186,661.67 is: 257,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,389.97 : 398,174.94 = 186,661.67 : x
  2. Step 2: Convert to fraction form
    288,389.97/398,174.94 = 186,661.67/x
  3. Step 3: Cross multiply
    288,389.97x = 398,174.94 × 186,661.67
  4. Step 4: Simplify right side
    288,389.97x = 74,323,997,261.68
  5. Step 5: Solve for x
    x = 74,323,997,261.68/288,389.97
  6. Step 6: Final answer
    x = 257,720.47

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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.