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Finding the Fourth Proportional to 911,059.40, 1,366,589.10 and 412,423.40

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Solution

The fourth proportional to 911,059.40, 1,366,589.10 and 412,423.40 is: 618,635.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,059.40 : 1,366,589.10 = 412,423.40 : x
  2. Step 2: Convert to fraction form
    911,059.40/1,366,589.10 = 412,423.40/x
  3. Step 3: Cross multiply
    911,059.40x = 1,366,589.10 × 412,423.40
  4. Step 4: Simplify right side
    911,059.40x = 563,613,323,024.94
  5. Step 5: Solve for x
    x = 563,613,323,024.94/911,059.40
  6. Step 6: Final answer
    x = 618,635.10

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Half scale
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Double scale
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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.