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Finding the Fourth Proportional to 343,999.80, 515,999.70 and 133,501.05

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Solution

The fourth proportional to 343,999.80, 515,999.70 and 133,501.05 is: 200,251.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,999.80 : 515,999.70 = 133,501.05 : x
  2. Step 2: Convert to fraction form
    343,999.80/515,999.70 = 133,501.05/x
  3. Step 3: Cross multiply
    343,999.80x = 515,999.70 × 133,501.05
  4. Step 4: Simplify right side
    343,999.80x = 68,886,501,749.69
  5. Step 5: Solve for x
    x = 68,886,501,749.69/343,999.80
  6. Step 6: Final answer
    x = 200,251.58

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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.