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Finding the Fourth Proportional to 343,938.90, 515,735.55 and 156,738.90

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Solution

The fourth proportional to 343,938.90, 515,735.55 and 156,738.90 is: 235,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,938.90 : 515,735.55 = 156,738.90 : x
  2. Step 2: Convert to fraction form
    343,938.90/515,735.55 = 156,738.90/x
  3. Step 3: Cross multiply
    343,938.90x = 515,735.55 × 156,738.90
  4. Step 4: Simplify right side
    343,938.90x = 80,835,822,797.90
  5. Step 5: Solve for x
    x = 80,835,822,797.90/343,938.90
  6. Step 6: Final answer
    x = 235,029.60

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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.