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Finding the Fourth Proportional to 378,756.72, 522,687.24 and 208,996.92

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Solution

The fourth proportional to 378,756.72, 522,687.24 and 208,996.92 is: 288,417.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,756.72 : 522,687.24 = 208,996.92 : x
  2. Step 2: Convert to fraction form
    378,756.72/522,687.24 = 208,996.92/x
  3. Step 3: Cross multiply
    378,756.72x = 522,687.24 × 208,996.92
  4. Step 4: Simplify right side
    378,756.72x = 109,240,023,283.30
  5. Step 5: Solve for x
    x = 109,240,023,283.30/378,756.72
  6. Step 6: Final answer
    x = 288,417.39

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1.5x scale

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.