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Finding the Fourth Proportional to 678,506.20, 936,301.98 and 376,680.76

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Solution

The fourth proportional to 678,506.20, 936,301.98 and 376,680.76 is: 519,799.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,506.20 : 936,301.98 = 376,680.76 : x
  2. Step 2: Convert to fraction form
    678,506.20/936,301.98 = 376,680.76/x
  3. Step 3: Cross multiply
    678,506.20x = 936,301.98 × 376,680.76
  4. Step 4: Simplify right side
    678,506.20x = 352,686,941,415.91
  5. Step 5: Solve for x
    x = 352,686,941,415.91/678,506.20
  6. Step 6: Final answer
    x = 519,799.14

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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.