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Finding the Fourth Proportional to 290,915.52, 436,323.84 and 80,504.28

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Solution

The fourth proportional to 290,915.52, 436,323.84 and 80,504.28 is: 120,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,915.52 : 436,323.84 = 80,504.28 : x
  2. Step 2: Convert to fraction form
    290,915.52/436,323.84 = 80,504.28/x
  3. Step 3: Cross multiply
    290,915.52x = 436,323.84 × 80,504.28
  4. Step 4: Simplify right side
    290,915.52x = 35,125,936,586.04
  5. Step 5: Solve for x
    x = 35,125,936,586.04/290,915.52
  6. Step 6: Final answer
    x = 120,742.74

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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.