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Finding the Fourth Proportional to 290,950.70, 436,426.14 and 91,286.70

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Solution

The fourth proportional to 290,950.70, 436,426.14 and 91,286.70 is: 136,930.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,950.70 : 436,426.14 = 91,286.70 : x
  2. Step 2: Convert to fraction form
    290,950.70/436,426.14 = 91,286.70/x
  3. Step 3: Cross multiply
    290,950.70x = 436,426.14 × 91,286.70
  4. Step 4: Simplify right side
    290,950.70x = 39,839,902,114.34
  5. Step 5: Solve for x
    x = 39,839,902,114.34/290,950.70
  6. Step 6: Final answer
    x = 136,930.08

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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.