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Finding the Fourth Proportional to 290,950.28, 436,424.58 and 91,270.46

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Solution

The fourth proportional to 290,950.28, 436,424.58 and 91,270.46 is: 136,905.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,950.28 : 436,424.58 = 91,270.46 : x
  2. Step 2: Convert to fraction form
    290,950.28/436,424.58 = 91,270.46/x
  3. Step 3: Cross multiply
    290,950.28x = 436,424.58 × 91,270.46
  4. Step 4: Simplify right side
    290,950.28x = 39,832,672,171.91
  5. Step 5: Solve for x
    x = 39,832,672,171.91/290,950.28
  6. Step 6: Final answer
    x = 136,905.43

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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.