Home / 378,935.72-522,930.21-209,168.63

Finding the Fourth Proportional to 378,935.72, 522,930.21 and 209,168.63

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Solution

The fourth proportional to 378,935.72, 522,930.21 and 209,168.63 is: 288,652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,935.72 : 522,930.21 = 209,168.63 : x
  2. Step 2: Convert to fraction form
    378,935.72/522,930.21 = 209,168.63/x
  3. Step 3: Cross multiply
    378,935.72x = 522,930.21 × 209,168.63
  4. Step 4: Simplify right side
    378,935.72x = 109,380,592,996.66
  5. Step 5: Solve for x
    x = 109,380,592,996.66/378,935.72
  6. Step 6: Final answer
    x = 288,652.11

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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.