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Finding the Fourth Proportional to 638,375.61, 880,964.40 and 351,905.95

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Solution

The fourth proportional to 638,375.61, 880,964.40 and 351,905.95 is: 485,633.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,375.61 : 880,964.40 = 351,905.95 : x
  2. Step 2: Convert to fraction form
    638,375.61/880,964.40 = 351,905.95/x
  3. Step 3: Cross multiply
    638,375.61x = 880,964.40 × 351,905.95
  4. Step 4: Simplify right side
    638,375.61x = 310,016,616,519.03
  5. Step 5: Solve for x
    x = 310,016,616,519.03/638,375.61
  6. Step 6: Final answer
    x = 485,633.55

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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.