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Finding the Fourth Proportional to 289,871.37, 434,756.84 and 76,641.57

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Solution

The fourth proportional to 289,871.37, 434,756.84 and 76,641.57 is: 114,949.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,871.37 : 434,756.84 = 76,641.57 : x
  2. Step 2: Convert to fraction form
    289,871.37/434,756.84 = 76,641.57/x
  3. Step 3: Cross multiply
    289,871.37x = 434,756.84 × 76,641.57
  4. Step 4: Simplify right side
    289,871.37x = 33,320,446,402.63
  5. Step 5: Solve for x
    x = 33,320,446,402.63/289,871.37
  6. Step 6: Final answer
    x = 114,949.08

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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.