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Finding the Fourth Proportional to 521,055, 719,055.90 and 282,591

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Solution

The fourth proportional to 521,055, 719,055.90 and 282,591 is: 389,975.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,055 : 719,055.90 = 282,591 : x
  2. Step 2: Convert to fraction form
    521,055/719,055.90 = 282,591/x
  3. Step 3: Cross multiply
    521,055x = 719,055.90 × 282,591
  4. Step 4: Simplify right side
    521,055x = 203,198,725,836.90
  5. Step 5: Solve for x
    x = 203,198,725,836.90/521,055
  6. Step 6: Final answer
    x = 389,975.58

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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.