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Finding the Fourth Proportional to 653,161.80, 901,461.66 and 398,660.88

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Solution

The fourth proportional to 653,161.80, 901,461.66 and 398,660.88 is: 550,212.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,161.80 : 901,461.66 = 398,660.88 : x
  2. Step 2: Convert to fraction form
    653,161.80/901,461.66 = 398,660.88/x
  3. Step 3: Cross multiply
    653,161.80x = 901,461.66 × 398,660.88
  4. Step 4: Simplify right side
    653,161.80x = 359,377,498,661.86
  5. Step 5: Solve for x
    x = 359,377,498,661.86/653,161.80
  6. Step 6: Final answer
    x = 550,212.06

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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.