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Finding the Fourth Proportional to 515,603.64, 711,537.86 and 289,254

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Solution

The fourth proportional to 515,603.64, 711,537.86 and 289,254 is: 399,173.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,603.64 : 711,537.86 = 289,254 : x
  2. Step 2: Convert to fraction form
    515,603.64/711,537.86 = 289,254/x
  3. Step 3: Cross multiply
    515,603.64x = 711,537.86 × 289,254
  4. Step 4: Simplify right side
    515,603.64x = 205,815,172,156.44
  5. Step 5: Solve for x
    x = 205,815,172,156.44/515,603.64
  6. Step 6: Final answer
    x = 399,173.23

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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.