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Finding the Fourth Proportional to 675,131.96, 931,770.24 and 388,664.12

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Solution

The fourth proportional to 675,131.96, 931,770.24 and 388,664.12 is: 536,407.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,131.96 : 931,770.24 = 388,664.12 : x
  2. Step 2: Convert to fraction form
    675,131.96/931,770.24 = 388,664.12/x
  3. Step 3: Cross multiply
    675,131.96x = 931,770.24 × 388,664.12
  4. Step 4: Simplify right side
    675,131.96x = 362,145,661,243.72
  5. Step 5: Solve for x
    x = 362,145,661,243.72/675,131.96
  6. Step 6: Final answer
    x = 536,407.22

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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.