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Finding the Fourth Proportional to 340,066.40, 509,662.20 and 206,805.20

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Solution

The fourth proportional to 340,066.40, 509,662.20 and 206,805.20 is: 309,941.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,066.40 : 509,662.20 = 206,805.20 : x
  2. Step 2: Convert to fraction form
    340,066.40/509,662.20 = 206,805.20/x
  3. Step 3: Cross multiply
    340,066.40x = 509,662.20 × 206,805.20
  4. Step 4: Simplify right side
    340,066.40x = 105,400,793,203.44
  5. Step 5: Solve for x
    x = 105,400,793,203.44/340,066.40
  6. Step 6: Final answer
    x = 309,941.80

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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.