Home / 378,727.09-522,669-217,646.35

Finding the Fourth Proportional to 378,727.09, 522,669 and 217,646.35

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Solution

The fourth proportional to 378,727.09, 522,669 and 217,646.35 is: 300,366.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,727.09 : 522,669 = 217,646.35 : x
  2. Step 2: Convert to fraction form
    378,727.09/522,669 = 217,646.35/x
  3. Step 3: Cross multiply
    378,727.09x = 522,669 × 217,646.35
  4. Step 4: Simplify right side
    378,727.09x = 113,757,000,108.15
  5. Step 5: Solve for x
    x = 113,757,000,108.15/378,727.09
  6. Step 6: Final answer
    x = 300,366.68

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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.