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Finding the Fourth Proportional to 309,529.89, 427,328.22 and 236,798.78

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Solution

The fourth proportional to 309,529.89, 427,328.22 and 236,798.78 is: 326,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,529.89 : 427,328.22 = 236,798.78 : x
  2. Step 2: Convert to fraction form
    309,529.89/427,328.22 = 236,798.78/x
  3. Step 3: Cross multiply
    309,529.89x = 427,328.22 × 236,798.78
  4. Step 4: Simplify right side
    309,529.89x = 101,190,797,834.94
  5. Step 5: Solve for x
    x = 101,190,797,834.94/309,529.89
  6. Step 6: Final answer
    x = 326,917.69

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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.