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Finding the Fourth Proportional to 711,168.76, 981,473.34 and 405,338.68

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Solution

The fourth proportional to 711,168.76, 981,473.34 and 405,338.68 is: 559,401.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,168.76 : 981,473.34 = 405,338.68 : x
  2. Step 2: Convert to fraction form
    711,168.76/981,473.34 = 405,338.68/x
  3. Step 3: Cross multiply
    711,168.76x = 981,473.34 × 405,338.68
  4. Step 4: Simplify right side
    711,168.76x = 397,829,108,090.79
  5. Step 5: Solve for x
    x = 397,829,108,090.79/711,168.76
  6. Step 6: Final answer
    x = 559,401.83

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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.