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Finding the Fourth Proportional to 697,857.72, 963,066.92 and 391,988.04

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Solution

The fourth proportional to 697,857.72, 963,066.92 and 391,988.04 is: 540,956.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,857.72 : 963,066.92 = 391,988.04 : x
  2. Step 2: Convert to fraction form
    697,857.72/963,066.92 = 391,988.04/x
  3. Step 3: Cross multiply
    697,857.72x = 963,066.92 × 391,988.04
  4. Step 4: Simplify right side
    697,857.72x = 377,510,714,359.64
  5. Step 5: Solve for x
    x = 377,510,714,359.64/697,857.72
  6. Step 6: Final answer
    x = 540,956.56

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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.