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Finding the Fourth Proportional to 465,398.60, 642,265.28 and 261,485.80

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Solution

The fourth proportional to 465,398.60, 642,265.28 and 261,485.80 is: 360,858.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,398.60 : 642,265.28 = 261,485.80 : x
  2. Step 2: Convert to fraction form
    465,398.60/642,265.28 = 261,485.80/x
  3. Step 3: Cross multiply
    465,398.60x = 642,265.28 × 261,485.80
  4. Step 4: Simplify right side
    465,398.60x = 167,943,250,553.02
  5. Step 5: Solve for x
    x = 167,943,250,553.02/465,398.60
  6. Step 6: Final answer
    x = 360,858.95

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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.