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Finding the Fourth Proportional to 481,909.09, 665,051.70 and 290,885.17

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Solution

The fourth proportional to 481,909.09, 665,051.70 and 290,885.17 is: 401,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,909.09 : 665,051.70 = 290,885.17 : x
  2. Step 2: Convert to fraction form
    481,909.09/665,051.70 = 290,885.17/x
  3. Step 3: Cross multiply
    481,909.09x = 665,051.70 × 290,885.17
  4. Step 4: Simplify right side
    481,909.09x = 193,453,676,813.29
  5. Step 5: Solve for x
    x = 193,453,676,813.29/481,909.09
  6. Step 6: Final answer
    x = 401,431.89

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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.