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Finding the Fourth Proportional to 351,955.40, 485,692.12 and 198,990.95

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Solution

The fourth proportional to 351,955.40, 485,692.12 and 198,990.95 is: 274,603.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,955.40 : 485,692.12 = 198,990.95 : x
  2. Step 2: Convert to fraction form
    351,955.40/485,692.12 = 198,990.95/x
  3. Step 3: Cross multiply
    351,955.40x = 485,692.12 × 198,990.95
  4. Step 4: Simplify right side
    351,955.40x = 96,648,337,083.07
  5. Step 5: Solve for x
    x = 96,648,337,083.07/351,955.40
  6. Step 6: Final answer
    x = 274,603.93

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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.