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Finding the Fourth Proportional to 354,421.35, 489,092.58 and 193,279.50

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Solution

The fourth proportional to 354,421.35, 489,092.58 and 193,279.50 is: 266,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,421.35 : 489,092.58 = 193,279.50 : x
  2. Step 2: Convert to fraction form
    354,421.35/489,092.58 = 193,279.50/x
  3. Step 3: Cross multiply
    354,421.35x = 489,092.58 × 193,279.50
  4. Step 4: Simplify right side
    354,421.35x = 94,531,569,316.11
  5. Step 5: Solve for x
    x = 94,531,569,316.11/354,421.35
  6. Step 6: Final answer
    x = 266,720.87

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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.