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Finding the Fourth Proportional to 678,698.19, 936,499.32 and 392,162.72

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Solution

The fourth proportional to 678,698.19, 936,499.32 and 392,162.72 is: 541,124.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,698.19 : 936,499.32 = 392,162.72 : x
  2. Step 2: Convert to fraction form
    678,698.19/936,499.32 = 392,162.72/x
  3. Step 3: Cross multiply
    678,698.19x = 936,499.32 × 392,162.72
  4. Step 4: Simplify right side
    678,698.19x = 367,260,115,926.85
  5. Step 5: Solve for x
    x = 367,260,115,926.85/678,698.19
  6. Step 6: Final answer
    x = 541,124.35

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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.