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Finding the Fourth Proportional to 388,660, 536,584.08 and 254,757.28

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Solution

The fourth proportional to 388,660, 536,584.08 and 254,757.28 is: 351,717.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,660 : 536,584.08 = 254,757.28 : x
  2. Step 2: Convert to fraction form
    388,660/536,584.08 = 254,757.28/x
  3. Step 3: Cross multiply
    388,660x = 536,584.08 × 254,757.28
  4. Step 4: Simplify right side
    388,660x = 136,698,700,712.10
  5. Step 5: Solve for x
    x = 136,698,700,712.10/388,660
  6. Step 6: Final answer
    x = 351,717.96

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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.