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Finding the Fourth Proportional to 711,497.70, 981,890.26 and 389,200.42

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Solution

The fourth proportional to 711,497.70, 981,890.26 and 389,200.42 is: 537,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,497.70 : 981,890.26 = 389,200.42 : x
  2. Step 2: Convert to fraction form
    711,497.70/981,890.26 = 389,200.42/x
  3. Step 3: Cross multiply
    711,497.70x = 981,890.26 × 389,200.42
  4. Step 4: Simplify right side
    711,497.70x = 382,152,101,585.91
  5. Step 5: Solve for x
    x = 382,152,101,585.91/711,497.70
  6. Step 6: Final answer
    x = 537,109.40

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Double scale
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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.