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Finding the Fourth Proportional to 290,404.80, 435,607.20 and 80,042.40

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Solution

The fourth proportional to 290,404.80, 435,607.20 and 80,042.40 is: 120,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,404.80 : 435,607.20 = 80,042.40 : x
  2. Step 2: Convert to fraction form
    290,404.80/435,607.20 = 80,042.40/x
  3. Step 3: Cross multiply
    290,404.80x = 435,607.20 × 80,042.40
  4. Step 4: Simplify right side
    290,404.80x = 34,867,045,745.28
  5. Step 5: Solve for x
    x = 34,867,045,745.28/290,404.80
  6. Step 6: Final answer
    x = 120,063.60

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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.