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Finding the Fourth Proportional to 638,502.71, 881,139.69 and 352,033.02

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Solution

The fourth proportional to 638,502.71, 881,139.69 and 352,033.02 is: 485,808.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,502.71 : 881,139.69 = 352,033.02 : x
  2. Step 2: Convert to fraction form
    638,502.71/881,139.69 = 352,033.02/x
  3. Step 3: Cross multiply
    638,502.71x = 881,139.69 × 352,033.02
  4. Step 4: Simplify right side
    638,502.71x = 310,190,266,112.56
  5. Step 5: Solve for x
    x = 310,190,266,112.56/638,502.71
  6. Step 6: Final answer
    x = 485,808.85

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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.