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Finding the Fourth Proportional to 669,015.96, 923,208.35 and 397,095.72

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Solution

The fourth proportional to 669,015.96, 923,208.35 and 397,095.72 is: 547,972.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,015.96 : 923,208.35 = 397,095.72 : x
  2. Step 2: Convert to fraction form
    669,015.96/923,208.35 = 397,095.72/x
  3. Step 3: Cross multiply
    669,015.96x = 923,208.35 × 397,095.72
  4. Step 4: Simplify right side
    669,015.96x = 366,602,082,467.78
  5. Step 5: Solve for x
    x = 366,602,082,467.78/669,015.96
  6. Step 6: Final answer
    x = 547,972.10

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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.