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Finding the Fourth Proportional to 413,969.40, 620,954.10 and 129,683.70

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Solution

The fourth proportional to 413,969.40, 620,954.10 and 129,683.70 is: 194,525.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,969.40 : 620,954.10 = 129,683.70 : x
  2. Step 2: Convert to fraction form
    413,969.40/620,954.10 = 129,683.70/x
  3. Step 3: Cross multiply
    413,969.40x = 620,954.10 × 129,683.70
  4. Step 4: Simplify right side
    413,969.40x = 80,527,625,218.17
  5. Step 5: Solve for x
    x = 80,527,625,218.17/413,969.40
  6. Step 6: Final answer
    x = 194,525.55

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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.