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Finding the Fourth Proportional to 715,951.77, 988,017.12 and 393,682.65

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Solution

The fourth proportional to 715,951.77, 988,017.12 and 393,682.65 is: 543,284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,951.77 : 988,017.12 = 393,682.65 : x
  2. Step 2: Convert to fraction form
    715,951.77/988,017.12 = 393,682.65/x
  3. Step 3: Cross multiply
    715,951.77x = 988,017.12 × 393,682.65
  4. Step 4: Simplify right side
    715,951.77x = 388,965,198,046.97
  5. Step 5: Solve for x
    x = 388,965,198,046.97/715,951.77
  6. Step 6: Final answer
    x = 543,284.08

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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.