Home / 715,915.42-987,942.39-393,625.18

Finding the Fourth Proportional to 715,915.42, 987,942.39 and 393,625.18

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Solution

The fourth proportional to 715,915.42, 987,942.39 and 393,625.18 is: 543,191.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,915.42 : 987,942.39 = 393,625.18 : x
  2. Step 2: Convert to fraction form
    715,915.42/987,942.39 = 393,625.18/x
  3. Step 3: Cross multiply
    715,915.42x = 987,942.39 × 393,625.18
  4. Step 4: Simplify right side
    715,915.42x = 388,879,001,093.38
  5. Step 5: Solve for x
    x = 388,879,001,093.38/715,915.42
  6. Step 6: Final answer
    x = 543,191.26

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1.5x scale

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.