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Finding the Fourth Proportional to 717,066.68, 989,514.45 and 394,713.81

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Solution

The fourth proportional to 717,066.68, 989,514.45 and 394,713.81 is: 544,684.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,066.68 : 989,514.45 = 394,713.81 : x
  2. Step 2: Convert to fraction form
    717,066.68/989,514.45 = 394,713.81/x
  3. Step 3: Cross multiply
    717,066.68x = 989,514.45 × 394,713.81
  4. Step 4: Simplify right side
    717,066.68x = 390,575,018,609.56
  5. Step 5: Solve for x
    x = 390,575,018,609.56/717,066.68
  6. Step 6: Final answer
    x = 544,684.38

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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.