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Finding the Fourth Proportional to 827,207.10, 1,240,810.65 and 353,940.30

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Solution

The fourth proportional to 827,207.10, 1,240,810.65 and 353,940.30 is: 530,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,207.10 : 1,240,810.65 = 353,940.30 : x
  2. Step 2: Convert to fraction form
    827,207.10/1,240,810.65 = 353,940.30/x
  3. Step 3: Cross multiply
    827,207.10x = 1,240,810.65 × 353,940.30
  4. Step 4: Simplify right side
    827,207.10x = 439,172,893,704.20
  5. Step 5: Solve for x
    x = 439,172,893,704.20/827,207.10
  6. Step 6: Final answer
    x = 530,910.45

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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.