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Finding the Fourth Proportional to 619,488.03, 855,136.62 and 439,142.61

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Solution

The fourth proportional to 619,488.03, 855,136.62 and 439,142.61 is: 606,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,488.03 : 855,136.62 = 439,142.61 : x
  2. Step 2: Convert to fraction form
    619,488.03/855,136.62 = 439,142.61/x
  3. Step 3: Cross multiply
    619,488.03x = 855,136.62 × 439,142.61
  4. Step 4: Simplify right side
    619,488.03x = 375,526,927,213.38
  5. Step 5: Solve for x
    x = 375,526,927,213.38/619,488.03
  6. Step 6: Final answer
    x = 606,189.16

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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.