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Finding the Fourth Proportional to 388,712.12, 536,239.44 and 227,468.28

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Solution

The fourth proportional to 388,712.12, 536,239.44 and 227,468.28 is: 313,798.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,712.12 : 536,239.44 = 227,468.28 : x
  2. Step 2: Convert to fraction form
    388,712.12/536,239.44 = 227,468.28/x
  3. Step 3: Cross multiply
    388,712.12x = 536,239.44 × 227,468.28
  4. Step 4: Simplify right side
    388,712.12x = 121,977,463,084.96
  5. Step 5: Solve for x
    x = 121,977,463,084.96/388,712.12
  6. Step 6: Final answer
    x = 313,798.97

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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.