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Finding the Fourth Proportional to 628,705.76, 943,058.94 and 207,981.63

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Solution

The fourth proportional to 628,705.76, 943,058.94 and 207,981.63 is: 311,972.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,705.76 : 943,058.94 = 207,981.63 : x
  2. Step 2: Convert to fraction form
    628,705.76/943,058.94 = 207,981.63/x
  3. Step 3: Cross multiply
    628,705.76x = 943,058.94 × 207,981.63
  4. Step 4: Simplify right side
    628,705.76x = 196,138,935,527.27
  5. Step 5: Solve for x
    x = 196,138,935,527.27/628,705.76
  6. Step 6: Final answer
    x = 311,972.55

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.