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Finding the Fourth Proportional to 398,765.06, 550,345.29 and 228,995.54

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Solution

The fourth proportional to 398,765.06, 550,345.29 and 228,995.54 is: 316,042.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,765.06 : 550,345.29 = 228,995.54 : x
  2. Step 2: Convert to fraction form
    398,765.06/550,345.29 = 228,995.54/x
  3. Step 3: Cross multiply
    398,765.06x = 550,345.29 × 228,995.54
  4. Step 4: Simplify right side
    398,765.06x = 126,026,616,870.01
  5. Step 5: Solve for x
    x = 126,026,616,870.01/398,765.06
  6. Step 6: Final answer
    x = 316,042.28

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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.