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Finding the Fourth Proportional to 486,718.97, 729,955.22 and 145,083.56

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Solution

The fourth proportional to 486,718.97, 729,955.22 and 145,083.56 is: 217,588.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,718.97 : 729,955.22 = 145,083.56 : x
  2. Step 2: Convert to fraction form
    486,718.97/729,955.22 = 145,083.56/x
  3. Step 3: Cross multiply
    486,718.97x = 729,955.22 × 145,083.56
  4. Step 4: Simplify right side
    486,718.97x = 105,904,501,958.18
  5. Step 5: Solve for x
    x = 105,904,501,958.18/486,718.97
  6. Step 6: Final answer
    x = 217,588.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.