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Finding the Fourth Proportional to 343,389.70, 515,084.55 and 156,765.70

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Solution

The fourth proportional to 343,389.70, 515,084.55 and 156,765.70 is: 235,148.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,389.70 : 515,084.55 = 156,765.70 : x
  2. Step 2: Convert to fraction form
    343,389.70/515,084.55 = 156,765.70/x
  3. Step 3: Cross multiply
    343,389.70x = 515,084.55 × 156,765.70
  4. Step 4: Simplify right side
    343,389.70x = 80,747,590,039.94
  5. Step 5: Solve for x
    x = 80,747,590,039.94/343,389.70
  6. Step 6: Final answer
    x = 235,148.55

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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.