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Finding the Fourth Proportional to 611,387.88, 916,786.77 and 256,306.56

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Solution

The fourth proportional to 611,387.88, 916,786.77 and 256,306.56 is: 384,336.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,387.88 : 916,786.77 = 256,306.56 : x
  2. Step 2: Convert to fraction form
    611,387.88/916,786.77 = 256,306.56/x
  3. Step 3: Cross multiply
    611,387.88x = 916,786.77 × 256,306.56
  4. Step 4: Simplify right side
    611,387.88x = 234,978,463,272.21
  5. Step 5: Solve for x
    x = 234,978,463,272.21/611,387.88
  6. Step 6: Final answer
    x = 384,336.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.