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Finding the Fourth Proportional to 719,840.25, 993,379.55 and 418,053.69

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Solution

The fourth proportional to 719,840.25, 993,379.55 and 418,053.69 is: 576,914.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,840.25 : 993,379.55 = 418,053.69 : x
  2. Step 2: Convert to fraction form
    719,840.25/993,379.55 = 418,053.69/x
  3. Step 3: Cross multiply
    719,840.25x = 993,379.55 × 418,053.69
  4. Step 4: Simplify right side
    719,840.25x = 415,285,984,357.77
  5. Step 5: Solve for x
    x = 415,285,984,357.77/719,840.25
  6. Step 6: Final answer
    x = 576,914.09

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.