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Finding the Fourth Proportional to 355,321.86, 490,186.67 and 211,998.57

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Solution

The fourth proportional to 355,321.86, 490,186.67 and 211,998.57 is: 292,464.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,321.86 : 490,186.67 = 211,998.57 : x
  2. Step 2: Convert to fraction form
    355,321.86/490,186.67 = 211,998.57/x
  3. Step 3: Cross multiply
    355,321.86x = 490,186.67 × 211,998.57
  4. Step 4: Simplify right side
    355,321.86x = 103,918,872,013.07
  5. Step 5: Solve for x
    x = 103,918,872,013.07/355,321.86
  6. Step 6: Final answer
    x = 292,464.06

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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.