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Finding the Fourth Proportional to 324,111.40, 485,994.30 and 136,911.40

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Solution

The fourth proportional to 324,111.40, 485,994.30 and 136,911.40 is: 205,294.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,111.40 : 485,994.30 = 136,911.40 : x
  2. Step 2: Convert to fraction form
    324,111.40/485,994.30 = 136,911.40/x
  3. Step 3: Cross multiply
    324,111.40x = 485,994.30 × 136,911.40
  4. Step 4: Simplify right side
    324,111.40x = 66,538,160,005.02
  5. Step 5: Solve for x
    x = 66,538,160,005.02/324,111.40
  6. Step 6: Final answer
    x = 205,294.11

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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.