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Finding the Fourth Proportional to 465,431.09, 642,297.48 and 261,490.61

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Solution

The fourth proportional to 465,431.09, 642,297.48 and 261,490.61 is: 360,858.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,431.09 : 642,297.48 = 261,490.61 : x
  2. Step 2: Convert to fraction form
    465,431.09/642,297.48 = 261,490.61/x
  3. Step 3: Cross multiply
    465,431.09x = 642,297.48 × 261,490.61
  4. Step 4: Simplify right side
    465,431.09x = 167,954,755,327.72
  5. Step 5: Solve for x
    x = 167,954,755,327.72/465,431.09
  6. Step 6: Final answer
    x = 360,858.48

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1.5x scale

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.