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Finding the Fourth Proportional to 716,956.83, 989,400.13 and 394,665.25

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Solution

The fourth proportional to 716,956.83, 989,400.13 and 394,665.25 is: 544,637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,956.83 : 989,400.13 = 394,665.25 : x
  2. Step 2: Convert to fraction form
    716,956.83/989,400.13 = 394,665.25/x
  3. Step 3: Cross multiply
    716,956.83x = 989,400.13 × 394,665.25
  4. Step 4: Simplify right side
    716,956.83x = 390,481,849,656.48
  5. Step 5: Solve for x
    x = 390,481,849,656.48/716,956.83
  6. Step 6: Final answer
    x = 544,637.88

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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.