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Finding the Fourth Proportional to 711,630.08, 981,919.68 and 405,693.44

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Solution

The fourth proportional to 711,630.08, 981,919.68 and 405,693.44 is: 559,782.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,630.08 : 981,919.68 = 405,693.44 : x
  2. Step 2: Convert to fraction form
    711,630.08/981,919.68 = 405,693.44/x
  3. Step 3: Cross multiply
    711,630.08x = 981,919.68 × 405,693.44
  4. Step 4: Simplify right side
    711,630.08x = 398,358,372,782.90
  5. Step 5: Solve for x
    x = 398,358,372,782.90/711,630.08
  6. Step 6: Final answer
    x = 559,782.93

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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.