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Finding the Fourth Proportional to 318,723, 439,837.74 and 177,411

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Solution

The fourth proportional to 318,723, 439,837.74 and 177,411 is: 244,827.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,723 : 439,837.74 = 177,411 : x
  2. Step 2: Convert to fraction form
    318,723/439,837.74 = 177,411/x
  3. Step 3: Cross multiply
    318,723x = 439,837.74 × 177,411
  4. Step 4: Simplify right side
    318,723x = 78,032,053,291.14
  5. Step 5: Solve for x
    x = 78,032,053,291.14/318,723
  6. Step 6: Final answer
    x = 244,827.18

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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.