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Finding the Fourth Proportional to 638,628, 881,296.92 and 352,140.72

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Solution

The fourth proportional to 638,628, 881,296.92 and 352,140.72 is: 485,948.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,628 : 881,296.92 = 352,140.72 : x
  2. Step 2: Convert to fraction form
    638,628/881,296.92 = 352,140.72/x
  3. Step 3: Cross multiply
    638,628x = 881,296.92 × 352,140.72
  4. Step 4: Simplify right side
    638,628x = 310,340,531,942.58
  5. Step 5: Solve for x
    x = 310,340,531,942.58/638,628
  6. Step 6: Final answer
    x = 485,948.83

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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.