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Finding the Fourth Proportional to 415,991.53, 624,080.65 and 131,699.08

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Solution

The fourth proportional to 415,991.53, 624,080.65 and 131,699.08 is: 197,578.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,991.53 : 624,080.65 = 131,699.08 : x
  2. Step 2: Convert to fraction form
    415,991.53/624,080.65 = 131,699.08/x
  3. Step 3: Cross multiply
    415,991.53x = 624,080.65 × 131,699.08
  4. Step 4: Simplify right side
    415,991.53x = 82,190,845,561.35
  5. Step 5: Solve for x
    x = 82,190,845,561.35/415,991.53
  6. Step 6: Final answer
    x = 197,578.17

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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.