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Finding the Fourth Proportional to 354,538.80, 489,900.69 and 269,508.24

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Solution

The fourth proportional to 354,538.80, 489,900.69 and 269,508.24 is: 372,405.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,538.80 : 489,900.69 = 269,508.24 : x
  2. Step 2: Convert to fraction form
    354,538.80/489,900.69 = 269,508.24/x
  3. Step 3: Cross multiply
    354,538.80x = 489,900.69 × 269,508.24
  4. Step 4: Simplify right side
    354,538.80x = 132,032,272,736.69
  5. Step 5: Solve for x
    x = 132,032,272,736.69/354,538.80
  6. Step 6: Final answer
    x = 372,405.71

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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.