Home / 389,972.96-538,113.24-228,769.19

Finding the Fourth Proportional to 389,972.96, 538,113.24 and 228,769.19

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Solution

The fourth proportional to 389,972.96, 538,113.24 and 228,769.19 is: 315,672.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,972.96 : 538,113.24 = 228,769.19 : x
  2. Step 2: Convert to fraction form
    389,972.96/538,113.24 = 228,769.19/x
  3. Step 3: Cross multiply
    389,972.96x = 538,113.24 × 228,769.19
  4. Step 4: Simplify right side
    389,972.96x = 123,103,730,297.12
  5. Step 5: Solve for x
    x = 123,103,730,297.12/389,972.96
  6. Step 6: Final answer
    x = 315,672.48

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Double scale
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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.