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Finding the Fourth Proportional to 485,331.67, 669,759.95 and 281,503.27

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Solution

The fourth proportional to 485,331.67, 669,759.95 and 281,503.27 is: 388,475.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,331.67 : 669,759.95 = 281,503.27 : x
  2. Step 2: Convert to fraction form
    485,331.67/669,759.95 = 281,503.27/x
  3. Step 3: Cross multiply
    485,331.67x = 669,759.95 × 281,503.27
  4. Step 4: Simplify right side
    485,331.67x = 188,539,616,040.04
  5. Step 5: Solve for x
    x = 188,539,616,040.04/485,331.67
  6. Step 6: Final answer
    x = 388,475.81

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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.