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Finding the Fourth Proportional to 711,344.59, 981,643.12 and 389,047.62

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Solution

The fourth proportional to 711,344.59, 981,643.12 and 389,047.62 is: 536,878.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,344.59 : 981,643.12 = 389,047.62 : x
  2. Step 2: Convert to fraction form
    711,344.59/981,643.12 = 389,047.62/x
  3. Step 3: Cross multiply
    711,344.59x = 981,643.12 × 389,047.62
  4. Step 4: Simplify right side
    711,344.59x = 381,905,919,525.37
  5. Step 5: Solve for x
    x = 381,905,919,525.37/711,344.59
  6. Step 6: Final answer
    x = 536,878.93

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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.