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Finding the Fourth Proportional to 714,252.77, 985,680.80 and 391,992.85

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Solution

The fourth proportional to 714,252.77, 985,680.80 and 391,992.85 is: 540,956.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,252.77 : 985,680.80 = 391,992.85 : x
  2. Step 2: Convert to fraction form
    714,252.77/985,680.80 = 391,992.85/x
  3. Step 3: Cross multiply
    714,252.77x = 985,680.80 × 391,992.85
  4. Step 4: Simplify right side
    714,252.77x = 386,379,824,022.32
  5. Step 5: Solve for x
    x = 386,379,824,022.32/714,252.77
  6. Step 6: Final answer
    x = 540,956.70

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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.