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Finding the Fourth Proportional to 519,636.48, 717,100.56 and 281,172.48

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Solution

The fourth proportional to 519,636.48, 717,100.56 and 281,172.48 is: 388,019.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,636.48 : 717,100.56 = 281,172.48 : x
  2. Step 2: Convert to fraction form
    519,636.48/717,100.56 = 281,172.48/x
  3. Step 3: Cross multiply
    519,636.48x = 717,100.56 × 281,172.48
  4. Step 4: Simplify right side
    519,636.48x = 201,628,942,864.59
  5. Step 5: Solve for x
    x = 201,628,942,864.59/519,636.48
  6. Step 6: Final answer
    x = 388,019.22

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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.