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Finding the Fourth Proportional to 608,923.40, 913,385.10 and 409,857.80

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Solution

The fourth proportional to 608,923.40, 913,385.10 and 409,857.80 is: 614,786.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,923.40 : 913,385.10 = 409,857.80 : x
  2. Step 2: Convert to fraction form
    608,923.40/913,385.10 = 409,857.80/x
  3. Step 3: Cross multiply
    608,923.40x = 913,385.10 × 409,857.80
  4. Step 4: Simplify right side
    608,923.40x = 374,358,007,638.78
  5. Step 5: Solve for x
    x = 374,358,007,638.78/608,923.40
  6. Step 6: Final answer
    x = 614,786.70

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Similar ratio
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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.