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Finding the Fourth Proportional to 715,950.44, 988,011.42 and 393,681.41

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Solution

The fourth proportional to 715,950.44, 988,011.42 and 393,681.41 is: 543,280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,950.44 : 988,011.42 = 393,681.41 : x
  2. Step 2: Convert to fraction form
    715,950.44/988,011.42 = 393,681.41/x
  3. Step 3: Cross multiply
    715,950.44x = 988,011.42 × 393,681.41
  4. Step 4: Simplify right side
    715,950.44x = 388,961,728,921.70
  5. Step 5: Solve for x
    x = 388,961,728,921.70/715,950.44
  6. Step 6: Final answer
    x = 543,280.24

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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.