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Finding the Fourth Proportional to 325,632.78, 488,404.80 and 85,726.62

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Solution

The fourth proportional to 325,632.78, 488,404.80 and 85,726.62 is: 128,578.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,632.78 : 488,404.80 = 85,726.62 : x
  2. Step 2: Convert to fraction form
    325,632.78/488,404.80 = 85,726.62/x
  3. Step 3: Cross multiply
    325,632.78x = 488,404.80 × 85,726.62
  4. Step 4: Simplify right side
    325,632.78x = 41,869,292,695.78
  5. Step 5: Solve for x
    x = 41,869,292,695.78/325,632.78
  6. Step 6: Final answer
    x = 128,578.25

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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.