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Finding the Fourth Proportional to 678,104.75, 935,813.72 and 376,298.75

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Solution

The fourth proportional to 678,104.75, 935,813.72 and 376,298.75 is: 519,308.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,104.75 : 935,813.72 = 376,298.75 : x
  2. Step 2: Convert to fraction form
    678,104.75/935,813.72 = 376,298.75/x
  3. Step 3: Cross multiply
    678,104.75x = 935,813.72 × 376,298.75
  4. Step 4: Simplify right side
    678,104.75x = 352,145,533,068.85
  5. Step 5: Solve for x
    x = 352,145,533,068.85/678,104.75
  6. Step 6: Final answer
    x = 519,308.46

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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.