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Finding the Fourth Proportional to 639,358.13, 882,309.96 and 352,878.21

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Solution

The fourth proportional to 639,358.13, 882,309.96 and 352,878.21 is: 486,969.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,358.13 : 882,309.96 = 352,878.21 : x
  2. Step 2: Convert to fraction form
    639,358.13/882,309.96 = 352,878.21/x
  3. Step 3: Cross multiply
    639,358.13x = 882,309.96 × 352,878.21
  4. Step 4: Simplify right side
    639,358.13x = 311,347,959,349.97
  5. Step 5: Solve for x
    x = 311,347,959,349.97/639,358.13
  6. Step 6: Final answer
    x = 486,969.58

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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.