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Finding the Fourth Proportional to 290,943.60, 436,609.80 and 133,090.80

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Solution

The fourth proportional to 290,943.60, 436,609.80 and 133,090.80 is: 199,725.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,943.60 : 436,609.80 = 133,090.80 : x
  2. Step 2: Convert to fraction form
    290,943.60/436,609.80 = 133,090.80/x
  3. Step 3: Cross multiply
    290,943.60x = 436,609.80 × 133,090.80
  4. Step 4: Simplify right side
    290,943.60x = 58,108,747,569.84
  5. Step 5: Solve for x
    x = 58,108,747,569.84/290,943.60
  6. Step 6: Final answer
    x = 199,725.13

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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.