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Finding the Fourth Proportional to 711,505.82, 981,877.70 and 389,215.82

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Solution

The fourth proportional to 711,505.82, 981,877.70 and 389,215.82 is: 537,117.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,505.82 : 981,877.70 = 389,215.82 : x
  2. Step 2: Convert to fraction form
    711,505.82/981,877.70 = 389,215.82/x
  3. Step 3: Cross multiply
    711,505.82x = 981,877.70 × 389,215.82
  4. Step 4: Simplify right side
    711,505.82x = 382,162,334,653.83
  5. Step 5: Solve for x
    x = 382,162,334,653.83/711,505.82
  6. Step 6: Final answer
    x = 537,117.65

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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.