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Finding the Fourth Proportional to 711,203.03, 981,428.94 and 405,345.61

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Solution

The fourth proportional to 711,203.03, 981,428.94 and 405,345.61 is: 559,359.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,203.03 : 981,428.94 = 405,345.61 : x
  2. Step 2: Convert to fraction form
    711,203.03/981,428.94 = 405,345.61/x
  3. Step 3: Cross multiply
    711,203.03x = 981,428.94 × 405,345.61
  4. Step 4: Simplify right side
    711,203.03x = 397,817,912,355.95
  5. Step 5: Solve for x
    x = 397,817,912,355.95/711,203.03
  6. Step 6: Final answer
    x = 559,359.14

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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.