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Finding the Fourth Proportional to 268,711.20, 403,066.80 and 189,979.20

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Solution

The fourth proportional to 268,711.20, 403,066.80 and 189,979.20 is: 284,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,711.20 : 403,066.80 = 189,979.20 : x
  2. Step 2: Convert to fraction form
    268,711.20/403,066.80 = 189,979.20/x
  3. Step 3: Cross multiply
    268,711.20x = 403,066.80 × 189,979.20
  4. Step 4: Simplify right side
    268,711.20x = 76,574,308,210.56
  5. Step 5: Solve for x
    x = 76,574,308,210.56/268,711.20
  6. Step 6: Final answer
    x = 284,968.80

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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.