Home / 986,915.89-1,479,732.31-387,935.65

Finding the Fourth Proportional to 986,915.89, 1,479,732.31 and 387,935.65

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Solution

The fourth proportional to 986,915.89, 1,479,732.31 and 387,935.65 is: 581,651.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,915.89 : 1,479,732.31 = 387,935.65 : x
  2. Step 2: Convert to fraction form
    986,915.89/1,479,732.31 = 387,935.65/x
  3. Step 3: Cross multiply
    986,915.89x = 1,479,732.31 × 387,935.65
  4. Step 4: Simplify right side
    986,915.89x = 574,040,915,505.85
  5. Step 5: Solve for x
    x = 574,040,915,505.85/986,915.89
  6. Step 6: Final answer
    x = 581,651.31

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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.