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Finding the Fourth Proportional to 345,382.38, 515,540.39 and 320,054.27

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Solution

The fourth proportional to 345,382.38, 515,540.39 and 320,054.27 is: 477,733.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,382.38 : 515,540.39 = 320,054.27 : x
  2. Step 2: Convert to fraction form
    345,382.38/515,540.39 = 320,054.27/x
  3. Step 3: Cross multiply
    345,382.38x = 515,540.39 × 320,054.27
  4. Step 4: Simplify right side
    345,382.38x = 165,000,898,998.99
  5. Step 5: Solve for x
    x = 165,000,898,998.99/345,382.38
  6. Step 6: Final answer
    x = 477,733.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.