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Finding the Fourth Proportional to 290,863.28, 436,294.92 and 91,184.72

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Solution

The fourth proportional to 290,863.28, 436,294.92 and 91,184.72 is: 136,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,863.28 : 436,294.92 = 91,184.72 : x
  2. Step 2: Convert to fraction form
    290,863.28/436,294.92 = 91,184.72/x
  3. Step 3: Cross multiply
    290,863.28x = 436,294.92 × 91,184.72
  4. Step 4: Simplify right side
    290,863.28x = 39,783,430,117.62
  5. Step 5: Solve for x
    x = 39,783,430,117.62/290,863.28
  6. Step 6: Final answer
    x = 136,777.08

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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.