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Finding the Fourth Proportional to 711,218.16, 981,498.12 and 405,287.97

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Solution

The fourth proportional to 711,218.16, 981,498.12 and 405,287.97 is: 559,307.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,218.16 : 981,498.12 = 405,287.97 : x
  2. Step 2: Convert to fraction form
    711,218.16/981,498.12 = 405,287.97/x
  3. Step 3: Cross multiply
    711,218.16x = 981,498.12 × 405,287.97
  4. Step 4: Simplify right side
    711,218.16x = 397,789,380,613.62
  5. Step 5: Solve for x
    x = 397,789,380,613.62/711,218.16
  6. Step 6: Final answer
    x = 559,307.12

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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.