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Finding the Fourth Proportional to 519,553.77, 717,479.36 and 491,248.69

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Solution

The fourth proportional to 519,553.77, 717,479.36 and 491,248.69 is: 678,391.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,553.77 : 717,479.36 = 491,248.69 : x
  2. Step 2: Convert to fraction form
    519,553.77/717,479.36 = 491,248.69/x
  3. Step 3: Cross multiply
    519,553.77x = 717,479.36 × 491,248.69
  4. Step 4: Simplify right side
    519,553.77x = 352,460,795,702.04
  5. Step 5: Solve for x
    x = 352,460,795,702.04/519,553.77
  6. Step 6: Final answer
    x = 678,391.37

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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.