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Finding the Fourth Proportional to 679,292.80, 1,018,906.80 and 229,969.60

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Solution

The fourth proportional to 679,292.80, 1,018,906.80 and 229,969.60 is: 344,943.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,292.80 : 1,018,906.80 = 229,969.60 : x
  2. Step 2: Convert to fraction form
    679,292.80/1,018,906.80 = 229,969.60/x
  3. Step 3: Cross multiply
    679,292.80x = 1,018,906.80 × 229,969.60
  4. Step 4: Simplify right side
    679,292.80x = 234,317,589,233.28
  5. Step 5: Solve for x
    x = 234,317,589,233.28/679,292.80
  6. Step 6: Final answer
    x = 344,943.43

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.