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Finding the Fourth Proportional to 406,225.85, 561,661.79 and 355,780.25

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Solution

The fourth proportional to 406,225.85, 561,661.79 and 355,780.25 is: 491,913.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,225.85 : 561,661.79 = 355,780.25 : x
  2. Step 2: Convert to fraction form
    406,225.85/561,661.79 = 355,780.25/x
  3. Step 3: Cross multiply
    406,225.85x = 561,661.79 × 355,780.25
  4. Step 4: Simplify right side
    406,225.85x = 199,828,170,282.75
  5. Step 5: Solve for x
    x = 199,828,170,282.75/406,225.85
  6. Step 6: Final answer
    x = 491,913.97

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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.