Home / 378,931.83-522,930.21-209,165.91

Finding the Fourth Proportional to 378,931.83, 522,930.21 and 209,165.91

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Solution

The fourth proportional to 378,931.83, 522,930.21 and 209,165.91 is: 288,651.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,931.83 : 522,930.21 = 209,165.91 : x
  2. Step 2: Convert to fraction form
    378,931.83/522,930.21 = 209,165.91/x
  3. Step 3: Cross multiply
    378,931.83x = 522,930.21 × 209,165.91
  4. Step 4: Simplify right side
    378,931.83x = 109,379,173,241.14
  5. Step 5: Solve for x
    x = 109,379,173,241.14/378,931.83
  6. Step 6: Final answer
    x = 288,651.32

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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.