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Finding the Fourth Proportional to 378,971.54, 522,967.02 and 209,202.02

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Solution

The fourth proportional to 378,971.54, 522,967.02 and 209,202.02 is: 288,691.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,971.54 : 522,967.02 = 209,202.02 : x
  2. Step 2: Convert to fraction form
    378,971.54/522,967.02 = 209,202.02/x
  3. Step 3: Cross multiply
    378,971.54x = 522,967.02 × 209,202.02
  4. Step 4: Simplify right side
    378,971.54x = 109,405,756,977.38
  5. Step 5: Solve for x
    x = 109,405,756,977.38/378,971.54
  6. Step 6: Final answer
    x = 288,691.22

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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.