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Finding the Fourth Proportional to 263,527.10, 395,328.99 and 85,990.40

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Solution

The fourth proportional to 263,527.10, 395,328.99 and 85,990.40 is: 128,998.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,527.10 : 395,328.99 = 85,990.40 : x
  2. Step 2: Convert to fraction form
    263,527.10/395,328.99 = 85,990.40/x
  3. Step 3: Cross multiply
    263,527.10x = 395,328.99 × 85,990.40
  4. Step 4: Simplify right side
    263,527.10x = 33,994,497,981.70
  5. Step 5: Solve for x
    x = 33,994,497,981.70/263,527.10
  6. Step 6: Final answer
    x = 128,998.11

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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.