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Finding the Fourth Proportional to 638,620.50, 881,251.25 and 352,134.44

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Solution

The fourth proportional to 638,620.50, 881,251.25 and 352,134.44 is: 485,920.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,620.50 : 881,251.25 = 352,134.44 : x
  2. Step 2: Convert to fraction form
    638,620.50/881,251.25 = 352,134.44/x
  3. Step 3: Cross multiply
    638,620.50x = 881,251.25 × 352,134.44
  4. Step 4: Simplify right side
    638,620.50x = 310,318,912,555.81
  5. Step 5: Solve for x
    x = 310,318,912,555.81/638,620.50
  6. Step 6: Final answer
    x = 485,920.68

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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.