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Finding the Fourth Proportional to 628,866.48, 867,791.96 and 356,939.91

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Solution

The fourth proportional to 628,866.48, 867,791.96 and 356,939.91 is: 492,552.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,866.48 : 867,791.96 = 356,939.91 : x
  2. Step 2: Convert to fraction form
    628,866.48/867,791.96 = 356,939.91/x
  3. Step 3: Cross multiply
    628,866.48x = 867,791.96 × 356,939.91
  4. Step 4: Simplify right side
    628,866.48x = 309,749,584,101.12
  5. Step 5: Solve for x
    x = 309,749,584,101.12/628,866.48
  6. Step 6: Final answer
    x = 492,552.23

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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.