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Finding the Fourth Proportional to 519,728, 717,226.56 and 281,264

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Solution

The fourth proportional to 519,728, 717,226.56 and 281,264 is: 388,145.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,728 : 717,226.56 = 281,264 : x
  2. Step 2: Convert to fraction form
    519,728/717,226.56 = 281,264/x
  3. Step 3: Cross multiply
    519,728x = 717,226.56 × 281,264
  4. Step 4: Simplify right side
    519,728x = 201,730,011,171.84
  5. Step 5: Solve for x
    x = 201,730,011,171.84/519,728
  6. Step 6: Final answer
    x = 388,145.36

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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.