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Finding the Fourth Proportional to 638,502.60, 881,139.96 and 352,015.32

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Solution

The fourth proportional to 638,502.60, 881,139.96 and 352,015.32 is: 485,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,502.60 : 881,139.96 = 352,015.32 : x
  2. Step 2: Convert to fraction form
    638,502.60/881,139.96 = 352,015.32/x
  3. Step 3: Cross multiply
    638,502.60x = 881,139.96 × 352,015.32
  4. Step 4: Simplify right side
    638,502.60x = 310,174,764,984.19
  5. Step 5: Solve for x
    x = 310,174,764,984.19/638,502.60
  6. Step 6: Final answer
    x = 485,784.65

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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.