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Finding the Fourth Proportional to 515,603.88, 711,538.22 and 289,254.24

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Solution

The fourth proportional to 515,603.88, 711,538.22 and 289,254.24 is: 399,173.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,603.88 : 711,538.22 = 289,254.24 : x
  2. Step 2: Convert to fraction form
    515,603.88/711,538.22 = 289,254.24/x
  3. Step 3: Cross multiply
    515,603.88x = 711,538.22 × 289,254.24
  4. Step 4: Simplify right side
    515,603.88x = 205,815,447,057.05
  5. Step 5: Solve for x
    x = 205,815,447,057.05/515,603.88
  6. Step 6: Final answer
    x = 399,173.58

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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.