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Finding the Fourth Proportional to 521,670.11, 786,528.28 and 518,431.73

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Solution

The fourth proportional to 521,670.11, 786,528.28 and 518,431.73 is: 781,645.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,670.11 : 786,528.28 = 518,431.73 : x
  2. Step 2: Convert to fraction form
    521,670.11/786,528.28 = 518,431.73/x
  3. Step 3: Cross multiply
    521,670.11x = 786,528.28 × 518,431.73
  4. Step 4: Simplify right side
    521,670.11x = 407,761,216,894.32
  5. Step 5: Solve for x
    x = 407,761,216,894.32/521,670.11
  6. Step 6: Final answer
    x = 781,645.74

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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.