Home / 389,979.96-538,175.90-228,837.69

Finding the Fourth Proportional to 389,979.96, 538,175.90 and 228,837.69

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Solution

The fourth proportional to 389,979.96, 538,175.90 and 228,837.69 is: 315,798.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,979.96 : 538,175.90 = 228,837.69 : x
  2. Step 2: Convert to fraction form
    389,979.96/538,175.90 = 228,837.69/x
  3. Step 3: Cross multiply
    389,979.96x = 538,175.90 × 228,837.69
  4. Step 4: Simplify right side
    389,979.96x = 123,154,929,769.67
  5. Step 5: Solve for x
    x = 123,154,929,769.67/389,979.96
  6. Step 6: Final answer
    x = 315,798.10

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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.