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Finding the Fourth Proportional to 355,321.70, 490,114.80 and 211,971.14

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Solution

The fourth proportional to 355,321.70, 490,114.80 and 211,971.14 is: 292,383.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,321.70 : 490,114.80 = 211,971.14 : x
  2. Step 2: Convert to fraction form
    355,321.70/490,114.80 = 211,971.14/x
  3. Step 3: Cross multiply
    355,321.70x = 490,114.80 × 211,971.14
  4. Step 4: Simplify right side
    355,321.70x = 103,890,192,886.87
  5. Step 5: Solve for x
    x = 103,890,192,886.87/355,321.70
  6. Step 6: Final answer
    x = 292,383.47

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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.