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Finding the Fourth Proportional to 340,935.20, 511,402.80 and 278,727.20

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Solution

The fourth proportional to 340,935.20, 511,402.80 and 278,727.20 is: 418,090.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,935.20 : 511,402.80 = 278,727.20 : x
  2. Step 2: Convert to fraction form
    340,935.20/511,402.80 = 278,727.20/x
  3. Step 3: Cross multiply
    340,935.20x = 511,402.80 × 278,727.20
  4. Step 4: Simplify right side
    340,935.20x = 142,541,870,516.16
  5. Step 5: Solve for x
    x = 142,541,870,516.16/340,935.20
  6. Step 6: Final answer
    x = 418,090.80

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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.