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Finding the Fourth Proportional to 636,978.39, 955,467.66 and 163,663.74

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Solution

The fourth proportional to 636,978.39, 955,467.66 and 163,663.74 is: 245,495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,978.39 : 955,467.66 = 163,663.74 : x
  2. Step 2: Convert to fraction form
    636,978.39/955,467.66 = 163,663.74/x
  3. Step 3: Cross multiply
    636,978.39x = 955,467.66 × 163,663.74
  4. Step 4: Simplify right side
    636,978.39x = 156,375,410,684.65
  5. Step 5: Solve for x
    x = 156,375,410,684.65/636,978.39
  6. Step 6: Final answer
    x = 245,495.63

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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.