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Finding the Fourth Proportional to 515,598.75, 711,531.14 and 289,249.11

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Solution

The fourth proportional to 515,598.75, 711,531.14 and 289,249.11 is: 399,166.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,598.75 : 711,531.14 = 289,249.11 : x
  2. Step 2: Convert to fraction form
    515,598.75/711,531.14 = 289,249.11/x
  3. Step 3: Cross multiply
    515,598.75x = 711,531.14 × 289,249.11
  4. Step 4: Simplify right side
    515,598.75x = 205,809,747,536.04
  5. Step 5: Solve for x
    x = 205,809,747,536.04/515,598.75
  6. Step 6: Final answer
    x = 399,166.50

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Double scale
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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.