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Finding the Fourth Proportional to 479,387.97, 661,306.28 and 388,846.17

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Solution

The fourth proportional to 479,387.97, 661,306.28 and 388,846.17 is: 536,405.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,387.97 : 661,306.28 = 388,846.17 : x
  2. Step 2: Convert to fraction form
    479,387.97/661,306.28 = 388,846.17/x
  3. Step 3: Cross multiply
    479,387.97x = 661,306.28 × 388,846.17
  4. Step 4: Simplify right side
    479,387.97x = 257,146,412,230.72
  5. Step 5: Solve for x
    x = 257,146,412,230.72/479,387.97
  6. Step 6: Final answer
    x = 536,405.64

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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.