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Finding the Fourth Proportional to 355,520.02, 490,625.36 and 212,253.30

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Solution

The fourth proportional to 355,520.02, 490,625.36 and 212,253.30 is: 292,914.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,520.02 : 490,625.36 = 212,253.30 : x
  2. Step 2: Convert to fraction form
    355,520.02/490,625.36 = 212,253.30/x
  3. Step 3: Cross multiply
    355,520.02x = 490,625.36 × 212,253.30
  4. Step 4: Simplify right side
    355,520.02x = 104,136,851,723.69
  5. Step 5: Solve for x
    x = 104,136,851,723.69/355,520.02
  6. Step 6: Final answer
    x = 292,914.17

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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.