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Finding the Fourth Proportional to 325,876.40, 488,814.60 and 89,218.70

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Solution

The fourth proportional to 325,876.40, 488,814.60 and 89,218.70 is: 133,828.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,876.40 : 488,814.60 = 89,218.70 : x
  2. Step 2: Convert to fraction form
    325,876.40/488,814.60 = 89,218.70/x
  3. Step 3: Cross multiply
    325,876.40x = 488,814.60 × 89,218.70
  4. Step 4: Simplify right side
    325,876.40x = 43,611,403,153.02
  5. Step 5: Solve for x
    x = 43,611,403,153.02/325,876.40
  6. Step 6: Final answer
    x = 133,828.05

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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.