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Finding the Fourth Proportional to 309,015.54, 426,255.21 and 181,586.34

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Solution

The fourth proportional to 309,015.54, 426,255.21 and 181,586.34 is: 250,479.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,015.54 : 426,255.21 = 181,586.34 : x
  2. Step 2: Convert to fraction form
    309,015.54/426,255.21 = 181,586.34/x
  3. Step 3: Cross multiply
    309,015.54x = 426,255.21 × 181,586.34
  4. Step 4: Simplify right side
    309,015.54x = 77,402,123,489.83
  5. Step 5: Solve for x
    x = 77,402,123,489.83/309,015.54
  6. Step 6: Final answer
    x = 250,479.71

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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.