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Finding the Fourth Proportional to 355,144.60, 490,087.12 and 211,830.48

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Solution

The fourth proportional to 355,144.60, 490,087.12 and 211,830.48 is: 292,318.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,144.60 : 490,087.12 = 211,830.48 : x
  2. Step 2: Convert to fraction form
    355,144.60/490,087.12 = 211,830.48/x
  3. Step 3: Cross multiply
    355,144.60x = 490,087.12 × 211,830.48
  4. Step 4: Simplify right side
    355,144.60x = 103,815,389,871.42
  5. Step 5: Solve for x
    x = 103,815,389,871.42/355,144.60
  6. Step 6: Final answer
    x = 292,318.65

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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.