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Finding the Fourth Proportional to 665,970.84, 998,950.77 and 287,159.34

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Solution

The fourth proportional to 665,970.84, 998,950.77 and 287,159.34 is: 430,736.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,970.84 : 998,950.77 = 287,159.34 : x
  2. Step 2: Convert to fraction form
    665,970.84/998,950.77 = 287,159.34/x
  3. Step 3: Cross multiply
    665,970.84x = 998,950.77 × 287,159.34
  4. Step 4: Simplify right side
    665,970.84x = 286,858,043,805.69
  5. Step 5: Solve for x
    x = 286,858,043,805.69/665,970.84
  6. Step 6: Final answer
    x = 430,736.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.