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Finding the Fourth Proportional to 439,971.78, 607,169.66 and 287,107.77

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Solution

The fourth proportional to 439,971.78, 607,169.66 and 287,107.77 is: 396,214.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,971.78 : 607,169.66 = 287,107.77 : x
  2. Step 2: Convert to fraction form
    439,971.78/607,169.66 = 287,107.77/x
  3. Step 3: Cross multiply
    439,971.78x = 607,169.66 × 287,107.77
  4. Step 4: Simplify right side
    439,971.78x = 174,323,127,094.26
  5. Step 5: Solve for x
    x = 174,323,127,094.26/439,971.78
  6. Step 6: Final answer
    x = 396,214.34

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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.