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Finding the Fourth Proportional to 399,234.28, 550,945.38 and 220,386.28

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Solution

The fourth proportional to 399,234.28, 550,945.38 and 220,386.28 is: 304,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,234.28 : 550,945.38 = 220,386.28 : x
  2. Step 2: Convert to fraction form
    399,234.28/550,945.38 = 220,386.28/x
  3. Step 3: Cross multiply
    399,234.28x = 550,945.38 × 220,386.28
  4. Step 4: Simplify right side
    399,234.28x = 121,420,802,781.39
  5. Step 5: Solve for x
    x = 121,420,802,781.39/399,234.28
  6. Step 6: Final answer
    x = 304,134.21

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1.5x scale

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.