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Finding the Fourth Proportional to 290,214.30, 435,321.45 and 79,851.90

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Solution

The fourth proportional to 290,214.30, 435,321.45 and 79,851.90 is: 119,777.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,214.30 : 435,321.45 = 79,851.90 : x
  2. Step 2: Convert to fraction form
    290,214.30/435,321.45 = 79,851.90/x
  3. Step 3: Cross multiply
    290,214.30x = 435,321.45 × 79,851.90
  4. Step 4: Simplify right side
    290,214.30x = 34,761,244,893.26
  5. Step 5: Solve for x
    x = 34,761,244,893.26/290,214.30
  6. Step 6: Final answer
    x = 119,777.85

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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.