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Finding the Fourth Proportional to 621,460.62, 857,681.46 and 379,884.60

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Solution

The fourth proportional to 621,460.62, 857,681.46 and 379,884.60 is: 524,280.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,460.62 : 857,681.46 = 379,884.60 : x
  2. Step 2: Convert to fraction form
    621,460.62/857,681.46 = 379,884.60/x
  3. Step 3: Cross multiply
    621,460.62x = 857,681.46 × 379,884.60
  4. Step 4: Simplify right side
    621,460.62x = 325,819,978,359.52
  5. Step 5: Solve for x
    x = 325,819,978,359.52/621,460.62
  6. Step 6: Final answer
    x = 524,280.97

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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.