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Finding the Fourth Proportional to 515,518.92, 711,729.07 and 400,580.45

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Solution

The fourth proportional to 515,518.92, 711,729.07 and 400,580.45 is: 553,044.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,518.92 : 711,729.07 = 400,580.45 : x
  2. Step 2: Convert to fraction form
    515,518.92/711,729.07 = 400,580.45/x
  3. Step 3: Cross multiply
    515,518.92x = 711,729.07 × 400,580.45
  4. Step 4: Simplify right side
    515,518.92x = 285,104,751,138.68
  5. Step 5: Solve for x
    x = 285,104,751,138.68/515,518.92
  6. Step 6: Final answer
    x = 553,044.20

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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.