Home / 521,816.39-781,825.91-407,919.88

Finding the Fourth Proportional to 521,816.39, 781,825.91 and 407,919.88

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Solution

The fourth proportional to 521,816.39, 781,825.91 and 407,919.88 is: 611,177.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,816.39 : 781,825.91 = 407,919.88 : x
  2. Step 2: Convert to fraction form
    521,816.39/781,825.91 = 407,919.88/x
  3. Step 3: Cross multiply
    521,816.39x = 781,825.91 × 407,919.88
  4. Step 4: Simplify right side
    521,816.39x = 318,922,327,393.93
  5. Step 5: Solve for x
    x = 318,922,327,393.93/521,816.39
  6. Step 6: Final answer
    x = 611,177.30

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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.