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Finding the Fourth Proportional to 717,066.20, 989,513.80 and 394,713.34

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Solution

The fourth proportional to 717,066.20, 989,513.80 and 394,713.34 is: 544,683.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,066.20 : 989,513.80 = 394,713.34 : x
  2. Step 2: Convert to fraction form
    717,066.20/989,513.80 = 394,713.34/x
  3. Step 3: Cross multiply
    717,066.20x = 989,513.80 × 394,713.34
  4. Step 4: Simplify right side
    717,066.20x = 390,574,296,108.95
  5. Step 5: Solve for x
    x = 390,574,296,108.95/717,066.20
  6. Step 6: Final answer
    x = 544,683.73

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.