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Finding the Fourth Proportional to 711,254.39, 981,538.81 and 388,957.57

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Solution

The fourth proportional to 711,254.39, 981,538.81 and 388,957.57 is: 536,765.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,254.39 : 981,538.81 = 388,957.57 : x
  2. Step 2: Convert to fraction form
    711,254.39/981,538.81 = 388,957.57/x
  3. Step 3: Cross multiply
    711,254.39x = 981,538.81 × 388,957.57
  4. Step 4: Simplify right side
    711,254.39x = 381,776,951,920.52
  5. Step 5: Solve for x
    x = 381,776,951,920.52/711,254.39
  6. Step 6: Final answer
    x = 536,765.69

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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.