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Finding the Fourth Proportional to 717,956.37, 990,786.56 and 395,678.07

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Solution

The fourth proportional to 717,956.37, 990,786.56 and 395,678.07 is: 546,039.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,956.37 : 990,786.56 = 395,678.07 : x
  2. Step 2: Convert to fraction form
    717,956.37/990,786.56 = 395,678.07/x
  3. Step 3: Cross multiply
    717,956.37x = 990,786.56 × 395,678.07
  4. Step 4: Simplify right side
    717,956.37x = 392,032,511,864.35
  5. Step 5: Solve for x
    x = 392,032,511,864.35/717,956.37
  6. Step 6: Final answer
    x = 546,039.46

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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.