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Finding the Fourth Proportional to 719,978.17, 993,439.97 and 465,181.73

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Solution

The fourth proportional to 719,978.17, 993,439.97 and 465,181.73 is: 641,866.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,978.17 : 993,439.97 = 465,181.73 : x
  2. Step 2: Convert to fraction form
    719,978.17/993,439.97 = 465,181.73/x
  3. Step 3: Cross multiply
    719,978.17x = 993,439.97 × 465,181.73
  4. Step 4: Simplify right side
    719,978.17x = 462,130,126,352.25
  5. Step 5: Solve for x
    x = 462,130,126,352.25/719,978.17
  6. Step 6: Final answer
    x = 641,866.86

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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.