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Finding the Fourth Proportional to 711,498.88, 981,893.76 and 389,189.76

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Solution

The fourth proportional to 711,498.88, 981,893.76 and 389,189.76 is: 537,095.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,498.88 : 981,893.76 = 389,189.76 : x
  2. Step 2: Convert to fraction form
    711,498.88/981,893.76 = 389,189.76/x
  3. Step 3: Cross multiply
    711,498.88x = 981,893.76 × 389,189.76
  4. Step 4: Simplify right side
    711,498.88x = 382,142,996,799.90
  5. Step 5: Solve for x
    x = 382,142,996,799.90/711,498.88
  6. Step 6: Final answer
    x = 537,095.71

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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.