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Finding the Fourth Proportional to 398,876.48, 550,652.68 and 308,028.48

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Solution

The fourth proportional to 398,876.48, 550,652.68 and 308,028.48 is: 425,236.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,876.48 : 550,652.68 = 308,028.48 : x
  2. Step 2: Convert to fraction form
    398,876.48/550,652.68 = 308,028.48/x
  3. Step 3: Cross multiply
    398,876.48x = 550,652.68 × 308,028.48
  4. Step 4: Simplify right side
    398,876.48x = 169,616,708,028.33
  5. Step 5: Solve for x
    x = 169,616,708,028.33/398,876.48
  6. Step 6: Final answer
    x = 425,236.17

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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.