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Finding the Fourth Proportional to 719,062.35, 992,304.89 and 396,772.21

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Solution

The fourth proportional to 719,062.35, 992,304.89 and 396,772.21 is: 547,545.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,062.35 : 992,304.89 = 396,772.21 : x
  2. Step 2: Convert to fraction form
    719,062.35/992,304.89 = 396,772.21/x
  3. Step 3: Cross multiply
    719,062.35x = 992,304.89 × 396,772.21
  4. Step 4: Simplify right side
    719,062.35x = 393,719,004,199.11
  5. Step 5: Solve for x
    x = 393,719,004,199.11/719,062.35
  6. Step 6: Final answer
    x = 547,545.01

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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.