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Finding the Fourth Proportional to 711,641.59, 982,067.76 and 389,350.69

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Solution

The fourth proportional to 711,641.59, 982,067.76 and 389,350.69 is: 537,305.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,641.59 : 982,067.76 = 389,350.69 : x
  2. Step 2: Convert to fraction form
    711,641.59/982,067.76 = 389,350.69/x
  3. Step 3: Cross multiply
    711,641.59x = 982,067.76 × 389,350.69
  4. Step 4: Simplify right side
    711,641.59x = 382,368,757,527.59
  5. Step 5: Solve for x
    x = 382,368,757,527.59/711,641.59
  6. Step 6: Final answer
    x = 537,305.25

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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.