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Finding the Fourth Proportional to 619,118.69, 928,678.23 and 408,707.42

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Solution

The fourth proportional to 619,118.69, 928,678.23 and 408,707.42 is: 613,061.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,118.69 : 928,678.23 = 408,707.42 : x
  2. Step 2: Convert to fraction form
    619,118.69/928,678.23 = 408,707.42/x
  3. Step 3: Cross multiply
    619,118.69x = 928,678.23 × 408,707.42
  4. Step 4: Simplify right side
    619,118.69x = 379,557,678,750.08
  5. Step 5: Solve for x
    x = 379,557,678,750.08/619,118.69
  6. Step 6: Final answer
    x = 613,061.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.