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Finding the Fourth Proportional to 353,939.76, 488,525.10 and 218,090.16

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Solution

The fourth proportional to 353,939.76, 488,525.10 and 218,090.16 is: 301,018.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,939.76 : 488,525.10 = 218,090.16 : x
  2. Step 2: Convert to fraction form
    353,939.76/488,525.10 = 218,090.16/x
  3. Step 3: Cross multiply
    353,939.76x = 488,525.10 × 218,090.16
  4. Step 4: Simplify right side
    353,939.76x = 106,542,517,223.02
  5. Step 5: Solve for x
    x = 106,542,517,223.02/353,939.76
  6. Step 6: Final answer
    x = 301,018.79

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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.