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Finding the Fourth Proportional to 711,167.76, 981,471.96 and 405,337.68

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Solution

The fourth proportional to 711,167.76, 981,471.96 and 405,337.68 is: 559,400.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,167.76 : 981,471.96 = 405,337.68 : x
  2. Step 2: Convert to fraction form
    711,167.76/981,471.96 = 405,337.68/x
  3. Step 3: Cross multiply
    711,167.76x = 981,471.96 × 405,337.68
  4. Step 4: Simplify right side
    711,167.76x = 397,827,567,251.45
  5. Step 5: Solve for x
    x = 397,827,567,251.45/711,167.76
  6. Step 6: Final answer
    x = 559,400.45

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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.