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Finding the Fourth Proportional to 519,221.90, 778,829.06 and 279,448.40

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Solution

The fourth proportional to 519,221.90, 778,829.06 and 279,448.40 is: 419,170.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,221.90 : 778,829.06 = 279,448.40 : x
  2. Step 2: Convert to fraction form
    519,221.90/778,829.06 = 279,448.40/x
  3. Step 3: Cross multiply
    519,221.90x = 778,829.06 × 279,448.40
  4. Step 4: Simplify right side
    519,221.90x = 217,642,534,690.50
  5. Step 5: Solve for x
    x = 217,642,534,690.50/519,221.90
  6. Step 6: Final answer
    x = 419,170.56

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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.