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Finding the Fourth Proportional to 865,633.12, 1,304,358.26 and 711,318.40

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Solution

The fourth proportional to 865,633.12, 1,304,358.26 and 711,318.40 is: 1,071,832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,633.12 : 1,304,358.26 = 711,318.40 : x
  2. Step 2: Convert to fraction form
    865,633.12/1,304,358.26 = 711,318.40/x
  3. Step 3: Cross multiply
    865,633.12x = 1,304,358.26 × 711,318.40
  4. Step 4: Simplify right side
    865,633.12x = 927,814,023,712.50
  5. Step 5: Solve for x
    x = 927,814,023,712.50/865,633.12
  6. Step 6: Final answer
    x = 1,071,832.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.