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Finding the Fourth Proportional to 378,731.50, 522,666.15 and 217,637.08

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Solution

The fourth proportional to 378,731.50, 522,666.15 and 217,637.08 is: 300,348.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,731.50 : 522,666.15 = 217,637.08 : x
  2. Step 2: Convert to fraction form
    378,731.50/522,666.15 = 217,637.08/x
  3. Step 3: Cross multiply
    378,731.50x = 522,666.15 × 217,637.08
  4. Step 4: Simplify right side
    378,731.50x = 113,751,534,700.84
  5. Step 5: Solve for x
    x = 113,751,534,700.84/378,731.50
  6. Step 6: Final answer
    x = 300,348.76

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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.