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Finding the Fourth Proportional to 309,560.39, 427,012.34 and 194,657.18

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Solution

The fourth proportional to 309,560.39, 427,012.34 and 194,657.18 is: 268,513.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,560.39 : 427,012.34 = 194,657.18 : x
  2. Step 2: Convert to fraction form
    309,560.39/427,012.34 = 194,657.18/x
  3. Step 3: Cross multiply
    309,560.39x = 427,012.34 × 194,657.18
  4. Step 4: Simplify right side
    309,560.39x = 83,121,014,821.25
  5. Step 5: Solve for x
    x = 83,121,014,821.25/309,560.39
  6. Step 6: Final answer
    x = 268,513.09

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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.