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Finding the Fourth Proportional to 389,665.76, 538,110.11 and 368,436.95

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Solution

The fourth proportional to 389,665.76, 538,110.11 and 368,436.95 is: 508,794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,665.76 : 538,110.11 = 368,436.95 : x
  2. Step 2: Convert to fraction form
    389,665.76/538,110.11 = 368,436.95/x
  3. Step 3: Cross multiply
    389,665.76x = 538,110.11 × 368,436.95
  4. Step 4: Simplify right side
    389,665.76x = 198,259,644,235.82
  5. Step 5: Solve for x
    x = 198,259,644,235.82/389,665.76
  6. Step 6: Final answer
    x = 508,794.11

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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.