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Finding the Fourth Proportional to 693,376, 956,953.88 and 399,019.64

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Solution

The fourth proportional to 693,376, 956,953.88 and 399,019.64 is: 550,701.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,376 : 956,953.88 = 399,019.64 : x
  2. Step 2: Convert to fraction form
    693,376/956,953.88 = 399,019.64/x
  3. Step 3: Cross multiply
    693,376x = 956,953.88 × 399,019.64
  4. Step 4: Simplify right side
    693,376x = 381,843,392,694.20
  5. Step 5: Solve for x
    x = 381,843,392,694.20/693,376
  6. Step 6: Final answer
    x = 550,701.77

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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.