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Finding the Fourth Proportional to 411,488.71, 617,170.69 and 111,992.63

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Solution

The fourth proportional to 411,488.71, 617,170.69 and 111,992.63 is: 167,971.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,488.71 : 617,170.69 = 111,992.63 : x
  2. Step 2: Convert to fraction form
    411,488.71/617,170.69 = 111,992.63/x
  3. Step 3: Cross multiply
    411,488.71x = 617,170.69 × 111,992.63
  4. Step 4: Simplify right side
    411,488.71x = 69,118,565,786.15
  5. Step 5: Solve for x
    x = 69,118,565,786.15/411,488.71
  6. Step 6: Final answer
    x = 167,971.96

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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.