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Finding the Fourth Proportional to 331,985.79, 458,109.63 and 188,717.85

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Solution

The fourth proportional to 331,985.79, 458,109.63 and 188,717.85 is: 260,413.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,985.79 : 458,109.63 = 188,717.85 : x
  2. Step 2: Convert to fraction form
    331,985.79/458,109.63 = 188,717.85/x
  3. Step 3: Cross multiply
    331,985.79x = 458,109.63 × 188,717.85
  4. Step 4: Simplify right side
    331,985.79x = 86,453,464,437.90
  5. Step 5: Solve for x
    x = 86,453,464,437.90/331,985.79
  6. Step 6: Final answer
    x = 260,413.15

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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.