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Finding the Fourth Proportional to 351,978.18, 485,602.60 and 231,184.95

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Solution

The fourth proportional to 351,978.18, 485,602.60 and 231,184.95 is: 318,951.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,978.18 : 485,602.60 = 231,184.95 : x
  2. Step 2: Convert to fraction form
    351,978.18/485,602.60 = 231,184.95/x
  3. Step 3: Cross multiply
    351,978.18x = 485,602.60 × 231,184.95
  4. Step 4: Simplify right side
    351,978.18x = 112,264,012,800.87
  5. Step 5: Solve for x
    x = 112,264,012,800.87/351,978.18
  6. Step 6: Final answer
    x = 318,951.63

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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.