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Finding the Fourth Proportional to 343,406.10, 515,109.15 and 231,431.70

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Solution

The fourth proportional to 343,406.10, 515,109.15 and 231,431.70 is: 347,147.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,406.10 : 515,109.15 = 231,431.70 : x
  2. Step 2: Convert to fraction form
    343,406.10/515,109.15 = 231,431.70/x
  3. Step 3: Cross multiply
    343,406.10x = 515,109.15 × 231,431.70
  4. Step 4: Simplify right side
    343,406.10x = 119,212,586,270.06
  5. Step 5: Solve for x
    x = 119,212,586,270.06/343,406.10
  6. Step 6: Final answer
    x = 347,147.55

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1.5x scale

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.