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Finding the Fourth Proportional to 543,896.10, 815,844.15 and 417,779.10

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Solution

The fourth proportional to 543,896.10, 815,844.15 and 417,779.10 is: 626,668.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,896.10 : 815,844.15 = 417,779.10 : x
  2. Step 2: Convert to fraction form
    543,896.10/815,844.15 = 417,779.10/x
  3. Step 3: Cross multiply
    543,896.10x = 815,844.15 × 417,779.10
  4. Step 4: Simplify right side
    543,896.10x = 340,842,634,727.27
  5. Step 5: Solve for x
    x = 340,842,634,727.27/543,896.10
  6. Step 6: Final answer
    x = 626,668.65

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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.