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Finding the Fourth Proportional to 439,860.70, 606,991.21 and 248,878.23

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Solution

The fourth proportional to 439,860.70, 606,991.21 and 248,878.23 is: 343,442.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,860.70 : 606,991.21 = 248,878.23 : x
  2. Step 2: Convert to fraction form
    439,860.70/606,991.21 = 248,878.23/x
  3. Step 3: Cross multiply
    439,860.70x = 606,991.21 × 248,878.23
  4. Step 4: Simplify right side
    439,860.70x = 151,066,897,970.36
  5. Step 5: Solve for x
    x = 151,066,897,970.36/439,860.70
  6. Step 6: Final answer
    x = 343,442.59

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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.