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Finding the Fourth Proportional to 717,204.82, 989,742.63 and 394,914.13

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Solution

The fourth proportional to 717,204.82, 989,742.63 and 394,914.13 is: 544,981.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,204.82 : 989,742.63 = 394,914.13 : x
  2. Step 2: Convert to fraction form
    717,204.82/989,742.63 = 394,914.13/x
  3. Step 3: Cross multiply
    717,204.82x = 989,742.63 × 394,914.13
  4. Step 4: Simplify right side
    717,204.82x = 390,863,349,650.36
  5. Step 5: Solve for x
    x = 390,863,349,650.36/717,204.82
  6. Step 6: Final answer
    x = 544,981.49

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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.