Home / 389,981.49-538,178.01-228,839.22

Finding the Fourth Proportional to 389,981.49, 538,178.01 and 228,839.22

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Solution

The fourth proportional to 389,981.49, 538,178.01 and 228,839.22 is: 315,800.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,981.49 : 538,178.01 = 228,839.22 : x
  2. Step 2: Convert to fraction form
    389,981.49/538,178.01 = 228,839.22/x
  3. Step 3: Cross multiply
    389,981.49x = 538,178.01 × 228,839.22
  4. Step 4: Simplify right side
    389,981.49x = 123,156,236,458.63
  5. Step 5: Solve for x
    x = 123,156,236,458.63/389,981.49
  6. Step 6: Final answer
    x = 315,800.21

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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.