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Finding the Fourth Proportional to 312,756.28, 431,601.96 and 169,514.80

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Solution

The fourth proportional to 312,756.28, 431,601.96 and 169,514.80 is: 233,929.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,756.28 : 431,601.96 = 169,514.80 : x
  2. Step 2: Convert to fraction form
    312,756.28/431,601.96 = 169,514.80/x
  3. Step 3: Cross multiply
    312,756.28x = 431,601.96 × 169,514.80
  4. Step 4: Simplify right side
    312,756.28x = 73,162,919,929.01
  5. Step 5: Solve for x
    x = 73,162,919,929.01/312,756.28
  6. Step 6: Final answer
    x = 233,929.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.