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Finding the Fourth Proportional to 711,491.08, 981,881.11 and 389,193.81

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Solution

The fourth proportional to 711,491.08, 981,881.11 and 389,193.81 is: 537,100.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,491.08 : 981,881.11 = 389,193.81 : x
  2. Step 2: Convert to fraction form
    711,491.08/981,881.11 = 389,193.81/x
  3. Step 3: Cross multiply
    711,491.08x = 981,881.11 × 389,193.81
  4. Step 4: Simplify right side
    711,491.08x = 382,142,045,258.52
  5. Step 5: Solve for x
    x = 382,142,045,258.52/711,491.08
  6. Step 6: Final answer
    x = 537,100.26

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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.